英语词汇“rhagon”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

rhagon

/ˈreɪɡɒn/

Zoology

noun

1Originally: a hypothetical stage in the development of sponges, having a simple pyramidal form with an apical osculum and rounded flagellated chambers like those of a mature leuconoid sponge. In later use: a young sponge at a stage of development in which the larva has settled to form a flattened pyramid with a functional system of water canals (irrespective of its internal organization).

2The most complex type of sponge structure, characterized by small rounded flagellated chambers and a high degree of folding; a sponge of this type. Also called leucon. Usually attributive.

Origin

Late 19th century; earliest use found in William Sollas (1849–1936), geologist and anthropologist. From ancient Greek ῥαγ-, ῥάξ grape, of uncertain origin (probably a loanword from another language of the Mediterranean) + -on; so called on account of its shape: see quot. 1887 at sense 1.

单词	rhagon
释义	rhagon /ˈreɪɡɒn/ Zoology noun 1Originally: a hypothetical stage in the development of sponges, having a simple pyramidal form with an apical osculum and rounded flagellated chambers like those of a mature leuconoid sponge. In later use: a young sponge at a stage of development in which the larva has settled to form a flattened pyramid with a functional system of water canals (irrespective of its internal organization). 2The most complex type of sponge structure, characterized by small rounded flagellated chambers and a high degree of folding; a sponge of this type. Also called leucon. Usually attributive. Origin Late 19th century; earliest use found in William Sollas (1849–1936), geologist and anthropologist. From ancient Greek ῥαγ-, ῥάξ grape, of uncertain origin (probably a loanword from another language of the Mediterranean) + -on; so called on account of its shape: see quot. 1887 at sense 1.
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