Pronunciation: (rā-sēm', ru-), [key]
1. a simple indeterminate inflorescence in which the flowers are borne on short pedicels lying along a common axis, as in the lily of the valley. See illus. under inflorescence.
2. a compound inflorescence in which the short pedicels with single flowers of the simple raceme are replaced by racemes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.