| 释义 |
diastemaenUK
di·a·ste·ma D0200500 (dī′ə-stē′mə)n. pl. di·a·ste·ma·ta (-mə-tə) A gap or space between two teeth.
[Late Latin diastēma, interval, from Greek, from diistanai, diastē-, to separate; see diastasis.]
di′a·ste·mat′ic (-stə-măt′ĭk) adj.diastema (ˌdaɪəˈstiːmə) n, pl -mata (-mətə) 1. (Pathology) an abnormal space, fissure, or cleft in a bodily organ or part2. (Dentistry) a gap between the teeth[C19: New Latin, from Greek: gap, from diistanai to separate; see diastasis]di•a•ste•ma (ˌdaɪ əˈsti mə)
n., pl. -ma•ta (-mə tə) a gap between two adjacent teeth. [1350–1400; Middle English < Late Latin < Greek diástēma interval, derivative (with -ma n. suffix of result) of diïstánai (see diastase)] Thesaurus| Noun | 1. | diastema - a gap or vacant space between two teethopening, gap - an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall" |
DiastemaenUK
diastema[‚dī·ə′stē·mə] (anatomy) A space between two types of teeth, as between an incisor and premolar. (cell and molecular biology) Modified cytoplasm of the equatorial plane prior to cell division. Diastema an excessive interval or space between teeth in mammals, usually caused by reduction of part of the teeth. In most herbivorous animals the cuspids and sometimes the incisors are reduced. Similar diastemata occur in the upper and lower jaws of rodents, horses, kangaroos, and other animals. In ruminants, diastema occurs only in the lower jaw. In carnivores it takes place without reduction of teeth. One diastema occurs in front of the fangs of the upper jaw (providing space for the lower fangs), and another is behind the lower fangs (allowing room for the upper fangs during biting). In closing the jaws the fangs nest and form a solid closure, preventing lateral motion of the jaw and aiding in the holding of prey. diastemaenUK
diastema [di″ah-ste´mah] (pl. diaste´mata) (Gr.) a space or cleft.di·a·ste·ma, pl. di·a·ste·ma·ta (dī'ă-stē'mă, -stē'mă-tă), 1. Space between two adjacent teeth in the same dental arch. 2. Fissure or abnormal opening in any part, especially if congenital. 3. Cleft or space between the maxillary lateral incisor and canine teeth, into which the lower canine is received when the jaws are closed; abnormal in humans but normal in dogs and many other animals. [G. diastēma, an interval] diastema (dī′ə-stē′mə)n. pl. diaste·mata (-mə-tə) A gap or space between two teeth.
di′a·ste·mat′ic (-stə-măt′ĭk) adj.di·a·ste·ma, pl. diastemata (dī'ă-stē'mă, -tă) 1. Fissure or abnormal opening in any part, especially if congenital. 2. Space between two adjacent teeth in the same dental arch. 3. A space between teeth not due to missing teeth. 4. A space between the upper central incisors in humans, or a space between two adjacent teeth in the same dental arch, especially that between the upper lateral incisor and the adjacent canine, into which the lower canine closes in the Carnivora, such as dogs.
Synonym(s): space (2) . [G. diastēma, an interval]diastema a gap in the teeth along the jawbone. In herbivores the diastema separates the incisors from the premolars resulting in an elongation of the jaw and aiding in feeding.di·a·ste·ma, pl. diastemata (dī'ă-stē'mă, -tă) 1. [TA] Space between two adjacent teeth in the same dental arch.
See also: gap2. Cleft or space between the maxillary lateral incisor and canine teeth, into which the lower canine is received when the jaws are closed; abnormal in humans. [G. diastēma, an interval]diastemaenUK
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