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1. Oxford Dictionary

   involucre

   • IPA[ˈɪnvəl(j)uːkə]

   英式

   • n.
     a membranous envelope.；a whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel.

   • noun: involucre, plural noun: involucres

2. • 更多解釋

   involucre

   • IPA[ˈinvəˌlo͞okər]

   美式

   • n.
     a whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the ...

   Oxford American Dictionary