单词 | fore-staff |
释义 | † fore-staffn. Nautical. Obsolete. = cross-staff n. 2 (see quot. 1867). ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > measuring altitude > [noun] > cross-staff Jacob's staff1559 cross-staff1594 fore-staff1669 radius1745 jackstaff1886 society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > cross-staff Jacob's staff1559 cross-staff1594 David's staff1623 back-staff1627 fore-staff1669 radiometer1728 jackstaff1886 1669 S. Sturmy Mariners Mag. ii. 82 Thus I have shewed you how to take an Observation by the Fore-Staff. 1719 Philos. Trans. 1717–19 (Royal Soc.) 30 993 The Moon was not too high to be well observed with a Forestaff. 1769 W. Falconer Universal Dict. Marine Arbalette, a cross-staff or fore-staff. 1867 W. H. Smyth & E. Belcher Sailor's Word-bk. Fore-staff, an instrument formerly used at sea for taking the altitudes of heavenly bodies..takes its name hence, that the observer in using it turns his face towards the object, in contradistinction to the back-staff. This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2021). < n.1669 |
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