imperforate definition

  • adjective:
    • Having no opening; maybe not perforated.
    • Not divided by rows of perforations: imperforate sheets of stamps.
    • Medicine Lacking a normal orifice: an imperforate rectum.
    • maybe not perforated.
    • perhaps not perforated; having no opening or aperture.
    • maybe not perforated; having no opening
  • noun:
    • An imperforate stamp.
    • A postage stamp which includes perhaps not already been perforated.
  • others:
    • maybe not perforated; having no perforations, foramina, or pores; atresial; in zoology, particularly, of or with respect to the Imperforata.
    • As placed on the shells associated with the gastropod Mollusca, having the internal components of the whorls coalesced into a columella making no opening or perforation. Into the Echinoidea, or sea-urchins, the mamelons which support the spines are imperforate when not pierced by a central foramen.

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