4. (Bookbinding) The preparation of the back of a book with glue, etc., before putting on the cover.
Back"joint` (&?;), n. [Back, a. or adv. + joint.] (Arch.) A rebate or chase in masonry left to receive a permanent slab or other filling.
Back"lash` (-lsh`), n. [Back, adv. + lash.] (Mech.) The distance through which one part of connected machinery, as a wheel, piston, or screw, can be moved without moving the connected parts, resulting from looseness in fitting or from wear; also, the jarring or reflex motion caused in badly fitting machinery by irregularities in velocity or a reverse of motion.
Back"less, a. Without a back.
Back"log` (-lg`; 115), n. [Back, a. + log.] A large stick of wood, forming the back of a fire on the hearth. [U.S.]
There was first a backlog, from fifteen to four and twenty inches in diameter and five feet long, imbedded in the ashes.
S. G. Goodrich.
{ Back"piece` (&?;), Back"plate` (&?;), } n. [Back, n. or a. + piece, plate.] A piece, or plate, which forms the back of anything, or which covers the back; armor for the back.
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{ Back"rack (bk"rk), Back"rag (bk"rg), } n. See Bacharach.
Backs (bks), n. pl. Among leather dealers, the thickest and stoutest tanned hides.
Back"saw` (bk"s`), n. [2d back, n. + saw.] A saw (as a tenon saw) whose blade is stiffened by an added metallic back.
Back"set` (-st`), n. [Back, adv. + set.] 1. A check; a relapse; a discouragement; a setback.