spirula Hear it!

spirula definition

spiru·la (spir′yə lə, spī′ro̵o lə)

noun pl. spirulae -·lae′ (-lē′)

any of a genus (Spirula) of two-gilled, deep-water cephalopods, having a flat spiral shell with a series of chambers

Etymology: ModL, name of the genus, dim. of L spira: see spire

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