κᾰνον-ίς · kanon-is — LSJ
= ἐργαλεῖον καλλιγραφικόν, ruler, dub. in AP 6.62 (Phil.), dub. in IG 2(2).1678.4.
frame with parallel cross-ledges, Arist. Ath. 64.2; door-frame, IG 2(2).1672.155 (pl.).
in pl., cross bars for strengthening an engine, Ph. Bel. 57.11.
pl., profile-stones running along the top of a wall, IG 2(2).1666A16: sg., row of such stones, ib. 1672.186. [ῑ AP l.c., s. v. l.]