from the GNU version of the Collaborative International Dictionary of English.
- The involucre or cup in which the acorn is fixed.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The
involucreor cup in which the acornis fixed.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun cup-shaped structure of hardened bracts at the base of an acorn
from Wiktionary, Creative Commons Attribution/Share-Alike License
acorn + cup
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