English Lexicon

Pinnation

/ˌpɪnˈeɪ.ʃən/
nounCEFR C1 (Advanced)Top #15000 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The arrangement of leaflets on either side of a common axis in a compound leaf.

    "The pinnation of the fern's leaves gives it a delicate appearance."
  2. 2

    A botanical term referring to a specific type of leaf structure characterized by a feather-like arrangement.

    "In botany, pinnation is crucial for identifying various species of plants."

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Linguistic Origin & Historical Etymology

The term 'pinnation' originates from the Latin word 'pinna', meaning 'feather' or 'wing', which reflects the feather-like arrangement of leaflets in certain plants. The word evolved in botanical terminology during the 19th century to describe specific leaf structures in ferns and other plants.

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