| dipneumona | <zoology> A group of spiders having only two lunglike organs. Alternative forms: Dipneumones. Origin: NL, fr. Gr. = lung. Source: Websters Dictionary (01 Mar 1998) |
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| dipnoi | <zoology> A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix. Origin: NL, fr. Gr. With two breathing apertures; = twice + breath. Source: Websters Dictionary (01 Mar 1998) |
| dipodia | 1. A developmental anomaly involving complete or incomplete duplication of a foot. 2. In conjoined twins and sirenomelia, a degree of fusion leaving two feet evident. Origin: G. Di-, two, + pous (pod-), foot (05 Mar 2000) |
| dipodomys | A genus of the family heteromyidae which contains 22 species. Their physiology is adapted for the conservation of water, and they seldom drink water. They are found in arid or desert habitats and travel by hopping on their hind limbs. (12 Dec 1998) |
| dipolar | Having two poles, as a magnetic bar. Origin: Pre. Di- + polar. Cf. Bipolar. Source: Websters Dictionary (01 Mar 1998) |
| dipolar buffer | Buffer whose structure can include opposite charges. Synonym: dipolar buffer. (05 Mar 2000) |
| dipolar ions | Ion's possessing both a negative charge and a positive charge, each localised at a different point in the molecule, which thus has both positive and negative "poles"; amino acids are the most notable dipolar ion's, containing a positively charged NH3+ group and a negatively charged COO- group at neutral pH. Synonym: amphions, zwitterions. (05 Mar 2000) |
| dipole | A molecule that has both negative and positive charges. (09 Oct 1997) |
| dipole theory | A theory in which the activation current of the heart is conceived as a single net moving dipole, the positive pole leading. (05 Mar 2000) |
| dipotassium phosphate | K2HPO4;a mild saline cathartic and diuretic. Synonym: dibasic potassium phosphate, dipotassium phosphate. (05 Mar 2000) |
| dippel's oil | <chemistry> [From the name of the inventor. See Bone oil, under Bone. Source: Websters Dictionary (01 Mar 1998) |
| dipper | 1. One who, or that which, dips; especially, a vessel used to dip water or other liquid; a ladle. 2. <zoology> A small grebe; the dabchick. The buffel duck. The water ouzel (Cinolus aquaticus) of Europe. The American dipper or ouzel (Cinclus Mexicanus). <astronomy> The Dipper, the seven principal stars in the constellation of the Great Bear; popularly so called from their arrangement in the form of a dipper. Synonym: Charles's Wain. See Ursa Major, under Ursa. Source: Websters Dictionary (01 Mar 1998) |
| dipping | 1. The act or process of immersing. 2. The act of inclining downward. 3. The act of lifting or moving a liquid with a dipper, ladle, or the like. 4. The process of cleaning or brightening sheet metal or metalware, especially. Brass, by dipping it in acids, etc. 5. The practice of taking snuff by rubbing the teeth or gums with a stick or brush dipped in snuff. Dipping needle, a magnetic needle suspended at its center of gravity, and moving freely in a vertical plane, so as to indicate on a graduated circle the magnetic dip or inclination. Source: Websters Dictionary (01 Mar 1998) |
| diprenorphine | <chemical> 21-cyclopropyl-6,7,8,14-tetrahydro-7 alpha-(1-hydroxy-1-methylethyl)-6,14-endo-ethanooripavine. A narcotic antagonist similar in action to naloxone. It is used to remobilise animals after etorphine neuroleptanalgesia and is considered a specific antagonist to etorphine. Pharmacological action: narcotic antagonists. Chemical name: 6,14-Ethenomorphinan-7-methanol, 17-(cyclopropylmethyl)-4,5-epoxy-18,19-dihydro-3-hydroxy-6-methoxy-alpha,alpha-dimethyl-, (5alpha,7alpha)- (12 Dec 1998) |
| dipropargyl | <chemistry> A pungent, mobile, volatile liquid, C6H6, produced artificially from certain allyl derivatives. Though isomeric with benzine, it is very different in its chemical relations. Synonym: dipropinyl. Origin: Prefix di- + propargyl. Source: Websters Dictionary (01 Mar 1998) |
| diplopagus |
(dip
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| diphenylamine chlorarsine |
(di
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| diphenylamino-azo-benzene |
(di
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| diplomate |
(dip
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| diphenylchlorarsine |
(di
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