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the free-swimming larva of certain sponges, which consists of a hollow spherical mass of cells some of which have flagella
Historical Examples

During the later periods of the amphiblastula stage a cavity appears in the granular cells dividing them into two layers.
The Works of Francis Maitland Balfour, Volume II (of 4) Francis Maitland Balfour


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  • Amphibolic

    equivocal; uncertain; changing; ambiguous.

  • Amphiboly

    ambiguity of speech, especially from uncertainty of the grammatical construction rather than of the meaning of the words, as in The Duke yet lives that Henry shall depose. Historical Examples The phrase transcendental object occurs once in the second Analogy and twice in the Note on amphiboly. A Commentary to Kant’s ‘Critique of Pure Reason’ […]

  • Amphibolic fistula

    amphibolic fistula amphibolic fistula am·phi·bol·ic fistula (ām’fə-bŏl’ĭk) or am·phib·o·lous fistula (ām-fĭb’ə-ləs) n. A complete anal fistula opening both externally and internally.

  • Amphibolite

    a metamorphic rock composed mainly of and plagioclase. Historical Examples The specimen was taken from a pegmatite dike at its contact with an amphibolite. The Long Labrador Trail Dillon Wallace The term is to some extent synonymous with “amphibolite” and “hornblende-schist.” Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 Various noun a metamorphic rock consisting […]

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