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scobina

scobina Bot.
  (skəʊˈbaɪnə)
  [mod.L., use of L. scobīna rasp.]
  ‘The zigzag rachis of the spikelets of grasses’ (Treas. Bot. 1866).

1839 Lindley Introd. Bot. i. ii. (ed. 3) 153 In the spikelets of Grasses the rachis has an unusual, toothed, flexuose appearance, and has received the name of scobina from Dumortier.

Oxford English Dictionary

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