a. (sb.) Zool. [ad. mod.L. lāmellibranchiātus (implied in -āta sb. pl.): see prec. + -ATE3.] Belonging to the group Lamellibranchiata of mollusks (so called as having lamellate gills) of which the ordinary bivalves (oysters, mussels, etc.) are typical.

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1855.  Ogilvie, Suppl., Lamellibranchiate, relating to the lamellibranchiata.

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1863.  Lyell, Antiq. Man, xx. 404. The existing lamellibranchiate bivalves.

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1880.  Huxley, Crayfish, 356. The little lamellibranchiate mollusk, Cyclas fontinalis.

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  b.  sb. A lamellibranch; a bivalve mollusk.

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1842.  Brande, Dict. Sci., etc., Lamellibranchiates, Lamellibranchiata, an order of Acephalous Mollusks.

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