- Ruling or controlling.
- In genetics, denoting an allele possessed by one of the parents of a hybrid that is expressed in the latter to the exclusion of a contrasting allele (the recessive) from the other parent.
[L. dominans, pres. p. of dominor, to rule, fr. dominus, lord, master, fr. domus, house]
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Examples: glitazone, GI cocktail, etc.