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词汇 mamelon
释义

Definition of mamelon in English:

mamelon

noun ˈmamɪlən
Biology

  • A small rounded structure, e.g. the central knob of a tubercle on a sea urchin.

    〔生〕（海胆等的）乳头突

    Example sentencesExamples
    • The second type is similar to the first in having laminae and possibly pillars, yet it lacks the mamelons.
    • Associated with mamelons are canals called astrorhizae.
    • The only adults with mamelons have an ‘open bite,’ which means that the front teeth don't touch each other, and the wearing off of the mamelons doesn't take place.
    • Thus, though in Arceuthobium the mamelon is always free from the ovary walls, in Loranthus a series can be traced through forms in which there is a temporary chamber filled by later growth of the mamelon.
    • On females note the uterus, ovary, vulva, and on males note the testis, ejaculatory duct, and the mamelons.

Origin

Mid 19th century: from French, 'nipple', from mamelle 'breast', from Latin mamilla 'little breast'.
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