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, + morphe, shape, form]

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apyk·no·mor·phous (ə-pik″no-morґfəs) [a-1 + pyknomorphous] not pyknomorphous; not having the stainable cell elements compactly placed; said of certain nerve cells.

Medical dictionary. 2011.

Look at other dictionaries:

  • parapyknomorphous — para·pyk·no·mor·phous (par″ə pik″no morґfəs) [para + pyknomorphous] neither pyknomorphous nor apyknomorphous, but between the two; staining moderately well. Said of certain nerve cells …   Medical dictionary

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