QUINCUNCIAL

Etymology

Adjective

quincuncial (comparative more quincuncial, superlative most quincuncial)

Arranged in a quincunx.

(botany) 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.

Source: Wiktionary

Quin*cun"cial, Etym: [L. quincuncialis, from quincunx. See Quincunx.]

1. Having the form of a quincunx.

2. (Bot.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition