Dictionary![]() ![]() spot'ted alfal'fa a"phida pale yellowish aphid, Therioaphis maculata, of the southern U.S., esp. west of the Mississippi River, that is marked with black spots and has fine spines on its back: a pest mainly of alfalfa and some other legumes, as clover. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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