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Sinus  [ Botany ]

Dictionary of botanic terminology - index of names

  A recess or hollow in a edge, usually on a leaf, between two lobes, segment or teeth.  
(1) Sinus (of leaf)    [ Botany ]
A leaf  sinus is the space or division (indentation) between two lobes or teeth  that does not break the continuity of the structure  Sinus only at the base of the leaf do not count.





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