idiosome


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id·i·o·some

(id'ē-ō-sōm),
The centrosome of a spermatid or of an oocyte.
[idio- + G. sōma, body]

idiosome

A little-used term variously defined as:
(1) Acrosome or attraction sphere of a spermatid or oocyte; 
(2) The smallest hypothetical unit of life;
(3) Possibly, microtubule organising centre, see there.