a. [ L. rosaceus, fr. rosa rose. ] 1. (Bot.) (a) Of or pertaining to a natural order of plants (Rosaceae) of which the rose is the type. It includes also the plums and cherries, meadowsweet, brambles, the strawberry, the hawthorn, applies, pears, service trees, and quinces. (b) Like a rose in shape or appearance; as, a rosaceous corolla. [ 1913 Webster ]

2. Of a pure purpish pink color. [ 1913 Webster ]

a. [ See Rosaceous. ] (Old med. Chem.) Pertaining to, or designating, an acid (called also lithic acid) found in certain red precipitates of urine. See Uric. [ Obs. ] [ 1913 Webster ]

n. realgar. [ Obs. ] chaucer. [ 1913 Webster ]

‖n. [ Cf. F. rosalie. ] (Mus.) A form of melody in which a phrase or passage is successively repeated, each time a step or half step higher; a melodic sequence. [ 1913 Webster ]

n. [ Rose + aniline. ] (Chem.) A complex nitrogenous base, C20H21N3O, obtained by oxidizing a mixture of aniline and toluidine, as a colorless crystalline substance which forms red salts. These salts are essential components of many of the socalled aniline dyes, as fuchsine, aniline red, etc. By extension, any one of the series of substances derived from, or related to, rosaniline proper. [ 1913 Webster ]

n. A cultivator of roses. [ 1913 Webster ]

n.; pl. Rosaries [ LL. rosarium a string of beads, L. rosarium a place planted with roses, rosa a rose: cf. F. rosaire. See Rose. ] 1. A bed of roses, or place where roses grow. “Thick rosaries of scented thorn.” Tennyson. [ 1913 Webster ]

2. (R.C.Ch.) A series of prayers (see Note below) arranged to be recited in order, on beads; also, a string of beads by which the prayers are counted. [ 1913 Webster ]

His idolized book, and the whole rosary of his prayers. Milton. [ 1913 Webster ]

☞ A rosary consists of fifteen decades. Each decade contains ten Ave Marias marked by small beads, preceded by a Paternoster, marked by a larger bead, and concluded by a Gloria Patri. Five decades make a chaplet, a third part of the rosary. Bp. Fitzpatrick. [ 1913 Webster ]

3. A chapelet; a garland; a series or collection, as of beautiful thoughts or of literary selections. [ 1913 Webster ]

Every day propound to yourself a rosary or chaplet of good works to present to God at night. Jer. Taylor. [ 1913 Webster ]

4. A coin bearing the figure of a rose, fraudulently circulated in Ireland in the 13th century for a penny. [ 1913 Webster ]

Rosary shell (Zool.), any marine gastropod shell of the genus Monodonta. They are top-shaped, bright-colored and pearly. [ 1913 Webster ]