Naut. Also uphroe, uvrou, uvrow. [a. Du. juffrouw, also juffer dead-eye, lit. maiden; the equivalent Ger. jungfer, Da. jomfrue, Sw. jungfru are used in same sense.] A crow-foot dead-eye; see quot.
1815. Falconer, Marine Dict. (ed. Burney), Uphroe. Ibid., s.v. Dead-eye, Crowfeet Dead-Eyes generally termed an euphroe.
1867. Smyth, Sailors Word-bk., s.v. Dead-eye, The crowfeet dead-eyes are long cylindrical blocks with a number of small holes in them, to receive the legs or lines composing the crowfoot. Also called uvronus. Ibid., Euphroe, Uphroe, Uvrou.
1874. Knight, Dict. Mech., s.v., The euphroe (or uphroe) and its pendent cords form a crow-foot.