heterotaxy

CIDE DICTIONARY

heterotaxy, n. [Hetero- + Gr. an arrangement, fr. to arrange.].

 Variation in arrangement from that existing in a normal form; heterogenous arrangement or structure, as, in botany, the deviation in position of the organs of a plant, from the ordinary or typical arrangement.

OXFORD DICTIONARY

heterotaxy, n. the abnormal disposition of organs or parts.

Etymology

HETERO- + Gk taxis arrangement