quarter-sight
Military now historical
noun
(Chiefly in plural) a sight engraved on the base ring of a cannon in quarter degrees and used to set its elevation.
Origin
Mid 19th century; earliest use found in The Penny Cyclopaedia.
| 单词 | quarter-sight |
| 释义 | quarter-sightMilitary now historical noun (Chiefly in plural) a sight engraved on the base ring of a cannon in quarter degrees and used to set its elevation. Origin |
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