noun.
The petals of a flower considered as a group or unit and usually of a color other than green; the inner whorl of the perianth.
The Century Dictionary and Cyclopedia
noun.
In botany, the envelop of a flower, within the calyx and immediately surrounding the stamens and pistil, usually of delicate texture and of some other color than green, and forming the most conspicuous part of the flower.
the GNU version of the Collaborative International Dictionary of English
noun.
The inner envelope of a flower; the part which surrounds the organs of fructification, consisting of one or more leaves, called petals. It is usually distinguished from the calyx by the fineness of its texture and the gayness of its colors. See the Note under blossom.
noun.
An outermost-but-one whorl of a flower, composed of petals, when it is not the same in appearance as the outermost whorl (the calyx); it usually comprises the petal, which may be fused.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
(botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth
Word Usage
"I am very curious where in corolla this was, in front of which sub-division."