Quin*cun"cial (?), [L. quincuncialis, from quincunx. See Quincunx.]

1.

Having the form of a quincunx.

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.

Quincuncial phyllotaxy Bot., an arrangement of five leaves in a spiral, each leaf two fifths of a circle from the next.

 

© Webster 1913.

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