bolt-head, bolt's-head
Also 7 boult head, boulthed.
[f. bolt n.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. 20 The Bolt-heads, etc., 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. |