acorn cup

2 definitions found

acorn cup - Collaborative International Dictionary of English v.0.48 :

  Acorn cup \A"corn cup\
     The involucre or cup in which the acorn is fixed.
     [1913 Webster]

acorn cup - WordNet (r) 2.1 (2005) :

  acorn cup
      n 1: cup-shaped structure of hardened bracts at the base of an
           acorn [syn: cupule, acorn cup]