a. [Gr. ἀ priv. + SYMMETRICAL: cf. prec.] Not symmetrical, out of proportion, with the parts not arranged correspondingly.
1690. Boyle, Chr. Virtuoso, II. 8. Truths … asymmetrical, or unsociable, that is, such as we see not how to reconcile with other things evidently and confessedly true.
1880. Günther, Fishes, 23. Flat-fishes are in fact nothing but asymmetrical Cod-fishes.
