Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A secondary involucre, as at the base of an umbel within a compound umbel.

from The Century Dictionary.

  • noun In botany, a secondary involucre in a compound cluster of flowers, as in many of the Umbelliferæ. See cut under inflorescence (fig. 9).

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Bot.) A partial, secondary, or small involucre. See Illust. of involucre.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun botany An involucre that forms at the base of a flower cluster within a compound inflorescence.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin involūcellum, diminutive of involūcrum, involucre; see involucrum.]

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