Definition of planula in English:

planula

nounPlural planulae ˈplanjʊləˈplanyələ

Zoology

A free-swimming coelenterate larva with a flattened, ciliated, solid body.
〔动〕浮浪幼体
as modifier a planula larva
Example sentencesExamples
- Hydra lives in freshwater, lacks a ciliated planula, and has clearly lost a medusa stage during its ancestry.
- The planulae of most cnidarians attach and lose, at most, a coat of swimming cilia.
- Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva.
- The planula larva has very few apoptotic cells.
- The planula larva settles on a hermit crab shell and metamorphoses into a primary polyp.

Origin

Late 19th century: modern Latin, diminutive of Latin planus 'plane, flat'.

Definition of planula in US English:

planula

nounˈplanyələ

Zoology

A free-swimming coelenterate larva with a flattened, ciliated, solid body.
〔动〕浮浪幼体
as modifier a planula larva
Example sentencesExamples
- The planula larva settles on a hermit crab shell and metamorphoses into a primary polyp.
- The planulae of most cnidarians attach and lose, at most, a coat of swimming cilia.
- Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva.
- Hydra lives in freshwater, lacks a ciliated planula, and has clearly lost a medusa stage during its ancestry.
- The planula larva has very few apoptotic cells.

Origin

Late 19th century: modern Latin, diminutive of Latin planus ‘plane, flat’.

词汇	planula
释义	Definition of planula in English: planula nounPlural planulae ˈplanjʊləˈplanyələ Zoology A free-swimming coelenterate larva with a flattened, ciliated, solid body. 〔动〕浮浪幼体 as modifier a planula larva Example sentencesExamples Hydra lives in freshwater, lacks a ciliated planula, and has clearly lost a medusa stage during its ancestry. The planulae of most cnidarians attach and lose, at most, a coat of swimming cilia. Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva. The planula larva has very few apoptotic cells. The planula larva settles on a hermit crab shell and metamorphoses into a primary polyp. Origin Late 19th century: modern Latin, diminutive of Latin planus 'plane, flat'. Definition of planula in US English: planula nounˈplanyələ Zoology A free-swimming coelenterate larva with a flattened, ciliated, solid body. 〔动〕浮浪幼体 as modifier a planula larva Example sentencesExamples The planula larva settles on a hermit crab shell and metamorphoses into a primary polyp. The planulae of most cnidarians attach and lose, at most, a coat of swimming cilia. Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva. Hydra lives in freshwater, lacks a ciliated planula, and has clearly lost a medusa stage during its ancestry. The planula larva has very few apoptotic cells. Origin Late 19th century: modern Latin, diminutive of Latin planus ‘plane, flat’.
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