acroplaxomeEtymologyAccording to the authors of its first attestation, from acro- + Ancient Greek πλατύς (platús, “flat”) + -some, but synonymous πλάξ (pláx) fits better.nounA structure that lies between the membranes of the acrosome and nucleus of a spermatozoon.“Herein, we report the structural characterization of a plate present in the subacrosomal space and linking the developing acrosome to the spermatid nucleus. This plate, which we designate acroplaxome (from the Greek words akros, topmost; platys, flat; sõma, body), consists of F-actin and Sak57 and is bordered by a marginal ring.”