planula

plan·u·la

P0353400 (plăn′yə-lə)n. pl. plan·u·lae (-lē′) The flat, free-swimming, ciliated larva of a cnidarian.

[New Latin plānula, from Latin, feminine diminutive of plānus, flat (from its shape); see pelə- in Indo-European roots.]

plan′u·lar, plan′u·late′ (-lāt′) adj.

planula

(ˈplænjʊlə) n, pl -lae (-ˌliː) (Zoology) the ciliated free-swimming larva of hydrozoan coelenterates such as the hydra[C19: from New Latin: a little plane, from Latin plānum level ground] ˈplanular adj

plan•u•la

(ˈplæn yə lə)

n., pl. -lae (-ˌli) the free-swimming larva of a cnidarian. [1865–70; < New Latin, diminutive of Latin plānum something flat. See plane¹, -ule] plan′u•lar, plan′u•late (-ˌleɪt) adj.

Thesaurus

Noun

planula - the flat ciliated free-swimming larva of hydrozoan coelenterateshydroid, hydrozoan - colonial coelenterates having the polyp phase dominant

Planula

planula

[′plan·yə·lə] (invertebrate zoology) The ciliated, free-swimming larva of coelenterates.

Planula

one of the larval stages in the development of coel-enterates. The body is oval, elongate, or wormlike; it consists of two layers. The outer layer, or ectoderm, consists of flagellate cells, among which are distributed musculoepithelial cells, nerve cells, and nemocysts. The inner layer, or endoderm, bounds the closed cavity of the gut. The planula swims in the water, subsequently attaching itself to the bottom and proceeding to the next stage of development—the polyp.

planula

[plan´u-lah] a larval coelenterate.

plan·u·la

, pl.

plan·u·lae

(plan'yū-lă, -lē), Name given by Lankester to a coelenterate embryo when it consists of the two primary germ layers only, the ectoderm and endoderm. [L. dim. of planum, flat surface]

planula

the ciliated larva of coelenterates, which lacks a body cavity.

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Words related to planula

noun the flat ciliated free-swimming larva of hydrozoan coelenterates

Related Words