| COV | covariance; cross-over value |
|---|---|
| COVESDEM | costovertebral segmentation defect with mesomelia [syndrome] |
| CoVF | cobra venom factor |
| COV | Coefficient of variation |
|---|---|
| CoVF | Cobra venom factor |
| covalent | Denoting an interatomic bond characterised by the sharing of 2, 4, or 6 electrons. (05 Mar 2000) |
|---|---|
| covalent bond | A bond between two or more atoms that is provided by electrons that travel between the atoms' nuclei, holding them together but keeping them a stable distance apart. (09 Oct 1997) |
| covalently closed circular DNA | <molecular biology> A circular molecule of double-stranded DNA which is supercoiled, or coiled up on itself due to internal tensions, because there are no breaks in the phosphate backbone (upon which the nucleotide bases are mounted) to relieve the tensions and allow it to form an open circle. (09 Oct 1997) |
| cove plane | A classic description of terminal inversion of the electrocardiographic T wave with the initial portion arched above the baseline and the terminal portion below it, the former being rounded and the latter pointed. (05 Mar 2000) |
| cover | Anything that provides protection from predators or ameliorates adverse conditions of streamflow and/or seasonal changes in metabolic costs. May be instream cover, turbulence, and/or overhead cover, and may be for the purpose of escape, feeding, hiding, or resting. (09 Oct 1997) |
| cover class | A category into which plant species would fit based upon their percent areal cover, the cover classes used (midpoints in parentheses) are T = <1% cover (0), 1 = 1-5% (3.0), 2 = 6-15% (10.5), 7 = 51-75% (63.0), 6 = 76-95% (85.5), 7 = 96-100% (98.0). (09 Oct 1997) |
| cover glass | A thin glass disk or plate covering an object examined under the microscope. Synonym: coverslip. (05 Mar 2000) |
| cover test | A test used for objective demonstration of ocular deviation in strabismus; may be performed by two methods: the cover-uncover test and the alternate cover test. (05 Mar 2000) |
| cover-uncover test | A test to detect strabismus; the patient's attention is directed to a small fixation object, one eye is covered and after a few seconds, uncovered; if the uncovered eye moves to see the picture, strabismus is present. (05 Mar 2000) |
| coverage | A measure of the extent to which the services rendered cover the potential need for these services in a community; applied specifically to such services as immunization in developing countries. (05 Mar 2000) |
| covering | A surrounding layer; something that covers or encloses, forming an outer layer. See: tunica. Coverings of spermatic cord, coverings of the spermatic cord, including external and internal spermatic fasciae, and cremasteric muscle and fascia. Synonym: tunicae funiculi spermatici. (05 Mar 2000) |
| coverslip | <microscopy> Thin glass, plastic, sapphire, SiO, NaCl, etc. Shaped into circles, squares, or rectangles for covering the specimen. Glass coverslips, grade no. 1 1/2, contain a high proportion of covers from 0.17 to 0.18 mm in thickness, close to the lens designer's specifications for employment of achromatic and apochromatic objectives of high numerical aperture. The thickness and refractive index of the glass coverslip are important because certain of their values have been assumed by the designer and manufacturer. These values have been specified by ASTM: thickness, commercial number 1 1/2: 0.16 to 0.19 mm, refractive index measured at the sodium D lines (589.3 nm), 1.523(0.005). (05 Aug 1998) |
| covert sensitization | Aversive conditioning or training to rid onself of an unwanted behaviour during which the patient is taught to imagine unpleasant and related aversive consequences while engaging in the unwanted habit. (05 Mar 2000) |
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| covariance |
(statistics) the mean value of the product of the deviations of two variates from their respective means
Ãâó: wordnet.princeton.edu/perl/webwn
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|---|---|
| covariant |
changing so that interrelations with another variable quantity or set of quantities remain unchanged
Ãâó: wordnet.princeton.edu/perl/webwn
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| cover |
provide with a covering or cause to be covered; "cover her face with a handkerchief"; "cover the child with a blanket"; "cover the grave with flowers" form a cover over; "The grass covered the grave" span an interval of distance, space or time; "The war extended over five years"; "The period covered the turn of the century"; "My land extends over the hills on the horizon"; "This farm covers some 200 acres"; "The Archipelago continues for another 500 miles" provide for; "The grant doesn't cover my salary" deal with verbally or in some form of artistic expression; "This book deals with incest"; "The course covered all of Western Civilization"; "The new book treats the history of China" embrace: include in scope; include as part of something broader; have as one's sphere or territory; "This group encompasses a wide range of people from different backgrounds"; "this should cover everyone in the group" traverse: travel across or pass over; "The caravan covered almost 100 miles each day" report: be responsible for reporting the details of, as in journalism; "Snow reported on China in the 1950's"; "The cub reporter covered New York City" hold within range of an aimed firearm to take an action to protect against future problems; "Count the cash in the drawer twice just to cover yourself" hide from view or knowledge; "The President covered the fact that he bugged the offices in the White House" protect or defend (a position in a game); "he covered left field" maintain a check on; especially by patrolling; "The second officer covered the top floor" protect by insurance; "The insurance won't cover this" make up for shortcomings or a feeling of inferiority by exaggerating good qualities; "he is compensating for being a bad father" invest with a large or excessive amount of something; "She covered herself with glory" screen: a covering that serves to conceal or shelter something; "they crouched behind the screen"; "under cover of darkness" help out by taking someone's place and temporarily assuming his responsibilities; "She is covering for our secretary who is ill this week" blanket: bedding that keeps a person warm in bed; "he pulled the covers over his head and went to sleep" be sufficient to meet, defray, or offset the charge or cost of; "Is this enough to cover the check?" spread over a surface to conceal or protect; "This paint covers well" the act of concealing the existence of something by obstructing the view of it; "the cover concealed their guns from enemy aircraft" shroud: cover as if with a shroud; "The origins of this civilization are shrouded in mystery" binding: the protective covering on the front, back, and spine of a book; "the book had a leather binding" covering: a natural object that covers or envelops; "under a covering of dust"; "the fox was flushed from its cover" breed: copulate with a female, used especially of horses; "The horse covers the mare" top: covering for a hole (especially a hole in the top of a container); "he removed the top of the carton"; "he couldn't get the top off of the bottle"; "put the cover back on the kettle" overlay: put something on top of something else; "cover the meat with a lot of gravy" play a higher card than the one previously played; "Smith covered again" fire that makes it difficult for the enemy to fire on your own individuals or formations; "artillery provided covering fire for the withdrawal" be responsible for guarding an opponent in a game cover charge: a fixed charge by a restaurant or night club over and above the charge for food and drink a recording of a song that was first recorded or made popular by somebody else; "they made a cover of a Beatles' song" brood: sit on (eggs); "Birds brood"; "The female covers the eggs" a false identity and background (especially one created for an undercover agent); "her new name and passport are cover for her next assignment" clothe, as if for protection from the elements; "cover your head!"
Ãâó: wordnet.princeton.edu/perl/webwn
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| cover glass |
a small and very thing piece of glass used to cover the specimen on a microscope slide
Ãâó: wordnet.princeton.edu/perl/webwn
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| covalent |
of or relating to or characterized by covalence; "covalent bond"
Ãâó: wordnet.princeton.edu/perl/webwn
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| COV | valence characterized by the sharing of electrons in a chemical compound |
|---|---|
| COV | valence characterized by the sharing of electrons in a chemical compound |
| COV | of or relating to or characterized by covalence |
| COV | a chemical bond that involves sharing a pair of electrons between atoms in a molecule |
| COV | statistical measure of the variance of two random variables measured in the same mean time period |
| COV | a small inlet |
| COV | small or narrow cave in the side of a cliff or mountain |
| COV | an assembly of witches |
| COV | (Bible) an agreement between God and his people in which God makes certain promises and requires certain behavior from them in return |
| COV | a signed written agreement between two or more parties (nations) to perform some action |
| COV | enter into a covenant |
| COV | agree to a covenant |
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