• (biology) A small gemma or bud of dormant embryonic cells produced by some freshwater sponges

    "1978 Patricia R. Bergquist, "Sponges" The actual formation of gemmules by fresh-water sponges is so clearly an adaptation to seasonal climatic changes, that at first it was reasonable to believe that seasonal alternation itself induced the gemmulation."

  • (obsolete) A hypothetical particle once thought to be the basis of heredity

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