| inversion of chromosomes | A chromosome aberration resulting from a double break in a segment of the chromosome, with end for end rotation of the fragment between the fracture lines, and refusion of the fragments; this results in reversal of the order of genes in that segment. (05 Mar 2000) |
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| inversion of the uterus | A turning of the uterus inside out, usually following childbirth. (05 Mar 2000) |
| inversion recovery | A magnetic resonance pulse sequence in which a series of 180 |
| invert | 1. To turn over; to put upside down; to upset; to place in a contrary order or direction; to reverse; as, to invert a cup, the order of words, rules of justice, etc. "That doth invert the attest of eyes and ears, As if these organs had deceptious functions." (Shak) "Such reasoning falls like an inverted cone, Wanting its proper base to stand upon." (Cowper) 2. To change the position of; said of tones which form a chord, or parts which compose harmony. 3. To divert; to convert to a wrong use. 4. <chemistry> To convert; to reverse; to decompose by, or subject to, inversion. See Inversion. <chemistry> To undergo inversion, as sugar. Subjected to the process of inversion; inverted; converted; as, invert sugar. Invert sugar, a variety of sugar, consisting of a mixture of dextrose and levulose, found naturally in fruits, and produced artificially by the inversion of cane sugar (sucrose); also, less properly, the grape sugar or dextrose obtained from starch. Origin: L. Invertere, inversum; pref. In- in + vertere to turn. Source: Websters Dictionary (01 Mar 1998) |
| invert sugar | Subjected to chemical inversion: inverted. (18 Nov 1997) |
| invertase | 1. <enzyme> Enzyme catalysing the hydrolysis of sucrose to glucose and fructose (sucrase), so called because the sugar solution changes from dextro rotatory to laevo rotatory during the course of the reaction. 2. Generally a name for an enzyme that catalyses certain molecular rearrangements. DNA invertases are a class of resolvase. (05 May 1997) |
| invertebral | <zoology> Same as Invertebrate. Source: Websters Dictionary (01 Mar 1998) |
| invertebrata | <zoology> A comprehensive division of the animal kingdom, including all except the Vertebrata. Origin: NL, fr. L. In- not + vertebratus vertebrate. Source: Websters Dictionary (01 Mar 1998) |
| invertebrate | <zoology> Destitute of a backbone; having no vertebrae; of or pertaining to the Invertebrata. One of the Invertebrata. Age of invertebrates. See Age, and Silurian. Source: Websters Dictionary (01 Mar 1998) |
| invertebrate hormones | Hormones produced by invertebrates, usually insects, mollusks, annelids, and helminths. (12 Dec 1998) |
| invertebrates | Animals that have no spinal column. (12 Dec 1998) |
| inverted | 1. Changed to a contrary or counterchanged order; reversed; characterised by inversion. 2. <geology> Situated apparently in reverse order, as strata when folded back upon themselves by upheaval. Inverted arch, an arch placed with crown downward; much used in foundations. Source: Websters Dictionary (01 Mar 1998) |
| inverted cone bur | A rotary cutting instrument in the shape of a truncated cone with the smaller end attached to the shaft; generally used for entering carious pits or creating undercuts in cavity preparations. (05 Mar 2000) |
| inverted follicular keratosis | A solitary benign epithelial tumour of infundibular hair follicle origin occurring on the face, consisting of a lobulated epidermal downgrowth of keratinizing squamous cells with a pattern of eddies or whorls. (05 Mar 2000) |
| inverted image | An image formed by the convergence of the actual rays of light from an object. Synonym: inverted image. (05 Mar 2000) |