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 Êstivation.
Quincuncial phyllotaxy (Bot.), an arrangement of five leaves in a
spiral, each leaf two fifths of a circle from the next.
Quin*cun"cial*ly, adv. In the manner or order of a quincunx.
Quin"cunx (?), n. [L., fr. quinque five + uncia an ounce. The quincunx
was marked by five small spots or balls. See Five, and Ounce the
weight.] 1. An arrangement of things by fives in a square or a
rectangle, one being placed at each corner and one in the middle;
especially, such an arrangement of trees repeated indefinitely, so as
to form a regular group with rows running in various directions.
2. (Astrol.) The position of planets when distant from each other five
signs, or 150∞. Hutton.
3. (Bot.) A quincuncial arrangement, as of the parts of a flower in
Êstivation. See Quincuncial, 2.
Quin*dec"a*gon (?), n. [L. quindecim fifteen + Gr. &?; angle.] (Geom.)
A plane figure with fifteen angles, and consequently fifteen sides.
||Quin`de*cem"vir (?), n.; pl. E. Quindecemvirs (#), L. Quindecemviri
||(#). [L., from quindecim fifteen + vir a man.] (Rom. Antiq.) One of a
||sacerdotal college of fifteen men whose chief duty was to take care
||of the Sibylline books.
Quin`de*cem"vi*rate (?), n. [L. quindecimviratus.] The body or office
of the quindecemviri.
Quin*dec"one (?), n. [L. quindecim fifteen.] (Chem.) An unsaturated
hydrocarbon, C15H26, of the valylene series, produced artificially as
an oily liquid. [Written also quindekone.]
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Quin`de*cyl"ic (?), n. [L. quindecim fifteen + -yl.] (Chem.) Pertaining
to, or designating, an acid of the fatty acid series, containing
fifteen atoms of carbon; called also pentadecylic acid.