chonen.

/kəʊn/

Etymology: < Greek χώνη, contracted < χοάνη choana n.

In sponges, a cortical dome-like structure communicating with the subdermal cavity.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > structure communicating with subdermal cavity

chone1887

1887 W. J. Sollas 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.

1906 Cambr. Nat. Hist. I. viii. 214 A chone is a passage through the cortex opening to the exterior.

1940 L. H. Hyman Invertebrates I. vi. 337 In the case of a thick cortex, each dermal pore generally opens into a canal termed a chone.

Derivatives

chonal adj.

/ˈkəʊnəl/ pertaining to this.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > relating to chone

chonal1888

1888 W. J. Sollas Tetractinellida p. xxiii The chonal sphincter.

This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2021).

单词	chone
释义	chonen. /kəʊn/ Etymology: < Greek χώνη, contracted < χοάνη choana n. In sponges, a cortical dome-like structure communicating with the subdermal cavity. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > structure communicating with subdermal cavity chone1887 1887 W. J. Sollas 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. 1906 Cambr. Nat. Hist. I. viii. 214 A chone is a passage through the cortex opening to the exterior. 1940 L. H. Hyman Invertebrates I. vi. 337 In the case of a thick cortex, each dermal pore generally opens into a canal termed a chone. Derivatives chonal adj. /ˈkəʊnəl/ pertaining to this. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > relating to chone chonal1888 1888 W. J. Sollas Tetractinellida p. xxiii The chonal sphincter. This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2021). < n.1887
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