n. [ OF. esventail. Cf. Ventail. ] The movable front to a helmet; the ventail. [ 1913 Webster ]

a. Pertaining to Mons Aventinus, one of the seven hills on which Rome stood. Bryant. [ 1913 Webster ]

n. A post of security or defense. [ Poetic ] [ 1913 Webster ]

Into the castle's tower,
The only Aventine that now is left him. Beau. & Fl. [ 1913 Webster ]

v. t. To thrust forward (at a venture), as a spear. [ Obs. ] Spenser. [ 1913 Webster ]

n. [ See Adventure, n. ] 1. Accident; chance; adventure. [ Obs. ] Chaucer. [ 1913 Webster ]

2. (Old Law) A mischance causing a person's death without felony, as by drowning, or falling into the fire. [ 1913 Webster ]

n. [ F. aventurine: cf. It. avventurino. ] 1. A kind of glass, containing gold-colored spangles. It was produced in the first place by the accidental (par aventure) dropping of some brass filings into a pot of melted glass. [ 1913 Webster ]

2. (Min.) A variety of translucent quartz, spangled throughout with scales of yellow mica. [ 1913 Webster ]

Aventurine feldspar, a variety of oligoclase with internal firelike reflections due to the presence of minute crystals, probably of hematite; sunstone. [ 1913 Webster ]