\Squil"la\, n.; pl. E. {Squillas}, L. {Squill[ae]}. [L., a sea onion, also, a prawn or shrimp. See {Squill}.] (Zo["o]l.) Any one of numerous stomapod crustaceans of the genus {Squilla} and allied genera. They make burrows in mud or beneath stones on the seashore. Called also {mantis shrimp}. See Illust. under {Stomapoda}.