techn. (See quots. and cf. Y 3.)
1857. Davies & Peck, Math. Dict., Wyes, the supports of the telescope in the theodolite and level.
1875. Knight, Dict. Mech., 2823/2. Wye, a Ｙ or crotch. Used in many ways as a temporary shore or brace.
1883. Gresley, Gloss. Coal-mining, 295. Wye (C[umb.]), the beam-end connection above the pump-rods of a winding and pumping engine.
