A).pinna-guard, a small crab that lives in the pinna's shell, said to give warning of approaching danger, Arist.HA 547b28 , Chrysipp.Stoic. 2.207 , Plu. 2.980b ; cf. πινυφύλαξ.
2). metaph., of a diminutive person, 'baby-crab', Ar.V. 1510 ; ὁ π. τοῦδε μάντεως χορός (prob. for χοροῦ), posted to give warning, S.Fr. 113 .