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Dictionary

het•er•o•sis

Pronunciation: (het"u-rō'sis), [key]
—n. Genetics.
the increase in growth, size, fecundity, function, yield, or other characters in hybrids over those of the parents. Also called hybrid vigor.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

heterosexuality

heterosporous

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