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pinnula

[pin-yuh-luh]
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noun, plural pin·nu·lae [pin-yuh-lee] /ˈpɪn yəˌli/.
  1. a pinnule.
  2. a barb of a feather.
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Origin of pinnula

1740–50; < Latin, diminutive of pinna pinna; see -ule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018