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proto- +‎ -morphic


protomorphic (not comparable)

  1. (biology) Having the most primitive character; in the earliest form.
    a protomorphic layer of tissue
    (Can we find and add a quotation of H. Spencer to this entry?)

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.