apyknomorphous

a·pyk·no·mor·phous

(ă-pik'nō-mōr'fŭs),
Denoting a cell or other structure that does not stain deeply because the stainable or chromophil material is not closely aggregated.
[G. a- priv. + pyknos, thick, + morphē, shape, form]

apyknomorphous

An obsolete adjective for:
(1) Referring to a cell or tissue which does not stain with usual histologic dyes, due to dispersion of stainable or chromophil material;
(2) Referring to an apyknomorph; 
(3) Amorphous.

apyknomorphous

(ā″pik″nō-mor′fŭs) [ ¹an- + pyknomorphous]
Pert. to a cell that does not stain deeply because its stainable material is not compact.