n. [ Gr. &unr_; very fat; e'y^ well + &unr_; fat. ] (Chem.) A limpid, oily liquid obtained by the destructive distillation of various vegetable and animal substances; -- specifically, an oil consisting largely of the higher hydrocarbons of the paraffin series. [ Written also eupion. ] [ 1913 Webster ]

a. A Shakespearean word of disputed meaning; perh., “abounding in marsh marigolds.” [ 1913 Webster ]

Thy banks with pioned and twilled brims. Shak. [ 1913 Webster ]

n. [ F. pionier, orig., a foot soldier, OF. peonier, fr. OF. peon a foot soldier, F. pion. See Pawn in chess. ] 1. (Mil.) A soldier detailed or employed to form roads, dig trenches, and make bridges, as an army advances. [ 1913 Webster ]

2. One who goes before, as into the wilderness, preparing the way for others to follow; as, pioneers of civilization; pioneers of reform. [ 1913 Webster ]

v. t. & i. [ imp. & p. p. Pioneered p. pr. & vb. n. Pioneering. ] 1. To go before, and prepare or open a way for; to act as pioneer. [ 1913 Webster ]

2. to take part in the early development of; to break ground in; to invent or originate. [ PJC ]

a. groundbreaking; originating; -- of efforts that begin work in a field or on a topic not previously widely known. [ PJC ]

In Utah, a legal holiday, July 24, commemorated the arrival, in 1847, of Brigham Young and his followers at the present site of Salt Lake City. [ Webster 1913 Suppl. ]

n. A pioneer. [ Obs. ] Shak. [ 1913 Webster ]

n. (Chem.) The ketone of propionic acid, obtained as a colorless fragrant liquid. [ 1913 Webster ]

‖n. pl. [ NL. See Pseudo-, and Scorpion. ] (Zool.) An order of Arachnoidea having the palpi terminated by large claws, as in the scorpions, but destitute of a caudal sting; the false scorpions. Called also Pseudoscorpii, and Pseudoscorpionina. See Illust. of Book scorpion, under Book. [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) A division of arachnids comprising the scorpions. [ 1913 Webster ]