[1] : The Collaborative International Dictionary of English v.0.48

quincuncial \quincun"cial\, l. quincuncialis, from quincunx.
   see quincunx.
   1913 webster
   1. having the form of a quincunx.
      1913 webster

   2. bot. having the leaves of a pentamerous calyx or corolla
      so imbricated that two are exterior, two are interior, and
      the other has one edge exterior and one interior; as,
      quincuncial aestivation.
      1913 webster

   quincuncial phyllotaxy bot., an arrangement of five
      leaves in a spiral, each leaf two fifths of a circle from
      the next.
      1913 webster
see also:
quincunx quincuncial phyllotaxy 

Quincuncial >> Q Words
Quincuncial, definition of term: Quincuncial
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