%sylva%

prop. n. The geological period from 280 million to 310 million years ago; -- it was characterized by a warm climate and abundance of swampy land.
Syn. -- Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period. [ WordNet 1.5 ]

2. A resident of the state of Pennsylvania. [ WordNet 1.5 ]

‖n.; pl. Sylvae [ L. sylva, better silva, a wood. See Silva. ] (Bot.) Same as Silva. [ 1913 Webster ]

a. [ See Silvan, a. ] 1. Of or pertaining to a sylva; forestlike; hence, rural; rustic. [ 1913 Webster ]

The traditional memory of a rural and a sylvan region . . . is usually exact as well as tenacious. De Quincey. [ 1913 Webster ]

2. Abounding in forests or in trees; woody. [ 1913 Webster ]

n. [ L. Sylvanus, better Silvanus. See Silvan, a. ] A fabled deity of the wood; a satyr; a faun; sometimes, a rustic. [ 1913 Webster ]

Her private orchards, walled on every side,
To lawless sylvans all access denied. Pope. [ 1913 Webster ]

n. [ Sylva + furfuran. ] (Chem.) A liquid hydrocarbon obtained together with furfuran (tetrol) by the distillation of pine wood; -- called also methyl tetrol, or methyl furfuran. [ 1913 Webster ]

n. [ Fr. Transylvania, where first found. ] (Min.) A telluride of gold and silver, (Au, Ag)Te2, of a steel gray, silver white, or brass yellow. It often occurs in implanted crystals resembling written characters, and hence is called graphic tellurium. H., 1.5-2. Sp.gr., 7.9-8.3. [ Webster 1913 Suppl. ]

n. [ NL., so called from Transylvania, where it was first found. ] (Chem.) An old name for tellurium. [ Written also silvanium. ] [ 1913 Webster ]

n. (Chem.) A salt of sylvic acid. [ 1913 Webster ]