Definition of trochophore in English:

trochophore

nounˈtrəʊkə(ʊ)fɔːˈtrɒkə(ʊ)fɔːˈträkəˌfôr

Zoology

The planktonic larva of certain invertebrates, including some molluscs and polychaete worms, having a roughly spherical body, a band of cilia, and a spinning motion.
Example sentencesExamples
- Polychaetes usually have separate sexes; many polychaetes hatch into a particular type of planktonic larva, the trochophore, which later metamorphoses into a juvenile annelid.
- The larva is a typical trochophore with apical organ, prototroch and metatroch of compound cilia, adoral ciliary zone and gastrotroch of separate cilia, and a pair of protonephridia; only the telotroch is missing.
- Another phylum, the Pogonophora, are also vermiform animals with a trochophore larva.
- The female releases her eggs one at a time, and one hatching the young animal will go through both a free-swimming trochophore and veliger stage, like all molluscs, before settling into an adult form in the muddy seafloor.
- One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record.

Origin

Late 19th century: from Greek trokhos 'wheel' + -phore.

Definition of trochophore in US English:

trochophore

nounˈträkəˌfôr

Zoology

The planktonic larva of certain invertebrates, including some mollusks and polychaete worms, having a roughly spherical body, a band of cilia, and a spinning motion.
Example sentencesExamples
- Another phylum, the Pogonophora, are also vermiform animals with a trochophore larva.
- The larva is a typical trochophore with apical organ, prototroch and metatroch of compound cilia, adoral ciliary zone and gastrotroch of separate cilia, and a pair of protonephridia; only the telotroch is missing.
- One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record.
- Polychaetes usually have separate sexes; many polychaetes hatch into a particular type of planktonic larva, the trochophore, which later metamorphoses into a juvenile annelid.
- The female releases her eggs one at a time, and one hatching the young animal will go through both a free-swimming trochophore and veliger stage, like all molluscs, before settling into an adult form in the muddy seafloor.

Origin

Late 19th century: from Greek trokhos ‘wheel’ + -phore.

单词	trochophore
释义	Definition of trochophore in English: trochophore nounˈtrəʊkə(ʊ)fɔːˈtrɒkə(ʊ)fɔːˈträkəˌfôr Zoology The planktonic larva of certain invertebrates, including some molluscs and polychaete worms, having a roughly spherical body, a band of cilia, and a spinning motion. Example sentencesExamples Polychaetes usually have separate sexes; many polychaetes hatch into a particular type of planktonic larva, the trochophore, which later metamorphoses into a juvenile annelid. The larva is a typical trochophore with apical organ, prototroch and metatroch of compound cilia, adoral ciliary zone and gastrotroch of separate cilia, and a pair of protonephridia; only the telotroch is missing. Another phylum, the Pogonophora, are also vermiform animals with a trochophore larva. The female releases her eggs one at a time, and one hatching the young animal will go through both a free-swimming trochophore and veliger stage, like all molluscs, before settling into an adult form in the muddy seafloor. One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record. Origin Late 19th century: from Greek trokhos 'wheel' + -phore. Definition of trochophore in US English: trochophore nounˈträkəˌfôr Zoology The planktonic larva of certain invertebrates, including some mollusks and polychaete worms, having a roughly spherical body, a band of cilia, and a spinning motion. Example sentencesExamples Another phylum, the Pogonophora, are also vermiform animals with a trochophore larva. The larva is a typical trochophore with apical organ, prototroch and metatroch of compound cilia, adoral ciliary zone and gastrotroch of separate cilia, and a pair of protonephridia; only the telotroch is missing. One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record. Polychaetes usually have separate sexes; many polychaetes hatch into a particular type of planktonic larva, the trochophore, which later metamorphoses into a juvenile annelid. The female releases her eggs one at a time, and one hatching the young animal will go through both a free-swimming trochophore and veliger stage, like all molluscs, before settling into an adult form in the muddy seafloor. Origin Late 19th century: from Greek trokhos ‘wheel’ + -phore.
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