| 释义 |
▪ I. chone|kəʊn|
[ad. Gr. χώνη, contr. f. χοάνη choana.]
In sponges, a cortical dome-like structure communicating with the subdermal cavity. Hence chonal |ˈkəʊnəl| a., pertaining to this.
1887Sollas in Encycl. Brit. XXII. 415/1 In many sponges..the cortical domes are constricted near their communication with the subdermal cavity by a transverse muscular sphincter, which defines an outer division or ectochone from an inner or endochone.., the whole structure being a chone. 1888― Tetractinellida p. xxiii, The chonal sphincter. 1906Cambr. Nat. Hist. I. viii. 214 A chone is a passage through the cortex opening to the exterior. 1940L. H. Hyman Invertebrates I. vi. 337 In the case of a thick cortex, each dermal pore generally opens into a canal termed a chone.
▪ II. chone
var. of chawn, Obs. |