| 释义 |
‖ diastema|daɪəˈstiːmə|
Pl. diastemata.
[L. diastēma, a. Gr. διάστηµα space between, interval.]
1. Mus. = prec.
1398Trevisa Barth. De P.R. xix. cxxxi. (1495) 941 Dyastema is couenable space of two voyces other of moo accordynge. 1727–51[see prec.].
2. Zool. and Anat. An interval or space between two consecutive teeth, or two kinds of teeth, occurring in most mammals except man.
1854Owen in Orr's Circ. Sc. Organ. Nat. I. 235 A long diastema is not..peculiar to the horse. Ibid. 298 In all the apes and monkeys of the Old World..the same number and kinds of teeth are present as in man; the first deviation being the disproportionate size of the canines and the concomitant break or ‘diastema’ in the dental series for the reception of their crowns when the mouth is shut. 1871Darwin Desc. Man II. xix. 324 Canine teeth which project above the others, with traces of a diastema or open space for the reception of the opposite canines. |
