quincuncial
(a.)骰子的五點形的,梅花形的
Quin·cun·cial
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 æstivation.
Quincuncial phyllotaxy Bot., an arrangement of five leaves in a spiral, each leaf two fifths of a circle from the next.
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