Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A sexual spore in which the sexes differ in size; -- opposed to isospore.

from The Century Dictionary and Cyclopedia

  • n. A form of spore produced among colonial radiolarians by the union of gametes of unlike size, as microspores and macrospores: contrasted with *isospore, 3.

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