
old instrument with two arms used for measuring angles
Found on
http://phrontistery.info/r.html

• (n.) An instrument with two arms that are pivoted together at one end, and a graduated arc, -- used by military engineers for measuring and laying off angles of fortifications.
Found on
http://thinkexist.com/dictionary/meaning/recipiangle/
Re·cip'i·an`gle (re*sĭp'ĭ*ăn`g'l)
noun [ Latin
recipere to take +
angulus angle.] An instrument with two arms that are pivoted together at one end, and a graduated arc, -- used by military engineers for measuring and laying off angles of fortifications.
Found on
http://www.encyclo.co.uk/webster/R/23
No exact match found.