planula

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plan·u·la

 (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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.planula - the flat ciliated free-swimming larva of hydrozoan coelenteratesplanula - the flat ciliated free-swimming larva of hydrozoan coelenterates
hydroid, hydrozoan - colonial coelenterates having the polyp phase dominant
References in periodicals archive ?
To which I would add one more consideration, that for our words to so name, one must have a faith in intelligibility as though something of our own planular ghosts were not mere hauntings but ways of flying on words into others, embracing and dissolving together, an Esperanto of the spirit.