sb. pl. Morphol. [mod. L., f. Gr. ζυγόν yoke + πλευρά side.] Organic forms having bilateral symmetry, with either two or four antimeres or corresponding opposite parts (DIPLEURA, TETRAPLEURA). Hence Zygopleural a., having bilateral symmetry.
1883. [see DIPLEURA].
1896. [see DIPLEURAL def.].
