Also 7 boult head, boulthed. [f. BOLT sb.1]
1. The head (a) of a bolt, or arrow; (b) of a bolt for holding parts together.
c. 1475. Voc., in Wr.-Wülcker, 812. Hec cuspis, a bolthed.
1483. Cath. Angl., 36. A Bolte hede, capitellum.
1691. T. H[ale], Acc. New Invent., p. xx. The Bolt-heads, &c., being fairly parcelled.
2. Chem. A globular flask with a long cylindrical neck, used in distillation.
1610. B. Jonson, Alch., II. ii. Blushes the bolts-head? Ibid., IV. iv. This doctor … Will close you so much gold in a bolt’s-head.
1667. Boyle, Orig. Formes & Qual. Having plac’d the mixture in a Bolt-head or Glass-egg with a long neck.
1763. Brit. Mag., IV. 63. Put it into a large bolt-head, with a long neck.
1820. Scott, Abbot, xxvi. Crucibles, bolt-heads, stoves, and the other furniture of a chemical laboratory.
1877. Griffin, Chem. Handicr., 146.
† 3. A dragon-fly. Obs.
1668. Wilkins, Real Char., II. v. § 2. 126. Naked winged Insects. 7 Dragon Fly, Bolts head.
