n. [ Gr. pe`talon a leaf, a leaf or plate of metal, fr. pe`talos outspread, broad, flat: cf. F. pétale. See Fathom. ] 1. (Bot.) One of the leaves of the corolla, or the colored leaves of a flower. See Corolla, and Illust. of Flower. [ 1913 Webster ]

2. (Zool.) One of the expanded ambulacra which form a rosette on the black of certain Echini. [ 1913 Webster ]

a. (Bot.) Having petals; as, a petaled flower; -- opposed to apetalous, and much used in compounds; as, one-petaled, three-petaled, etc. [ 1913 Webster ]

a. [ Petal + -ferous. ] Bearing petals. [ 1913 Webster ]

a. (Bot.) Having the form of a petal; petaloid; petal-shaped. [ 1913 Webster ]

a. [ Cf. F. pétalin. ] (Bot.) Pertaining to a petal; attached to, or resembling, a petal. [ 1913 Webster ]

n. [ Gr. petalismo`s, fr. pe`talon a leaf: cf. F. pétalisme. ] (Gr. Antiq.) A form of sentence among the ancient Syracusans by which they banished for five years a citizen suspected of having dangerous influence or ambition. It was similar to the ostracism in Athens; but olive leaves were used instead of shells for ballots. [ 1913 Webster ]

n. [ Cf. F. pétalite. ] (Min.) A rare mineral, occurring crystallized and in cleavable masses, usually white, or nearly so, in color. It is a silicate of aluminum and lithium. [ 1913 Webster ]

n. [ Petal + Gr. e'i^dos form. ] (Bot.) The metamorphosis of various floral organs, usually stamens, into petals. [ 1913 Webster ]

a. [ Petal + -oid: cf. F. pétaloïde. ] (Bot.) Petaline. [ 1913 Webster ]

a. (Bot.) Having the whole or part of the perianth petaline. [ 1913 Webster ]

Petaloideous division, that division of endogenous plants in which the perianth is wholly or partly petaline, embracing the Liliaceæ, Orchidaceæ, Amaryllideæ, etc. [ 1913 Webster ]