Boss
Webster's Dictionary [1]
(1): (n.) A master workman or superintendent; a director or manager; a political dictator.
(2): (n.) Any protuberant part; a round, swelling part or body; a knoblike process; as, a boss of wood.
(3): (n.) The enlarged part of a shaft, on which a wheel is keyed, or at the end, where it is coupled to another.
(4): (n.) A swage or die used for shaping metals.
(5): (n.) A protuberant ornament on any work, either of different material from that of the work or of the same, as upon a buckler or bridle; a stud; a knob; the central projection of a shield. See Umbilicus.
(6): (n.) A projecting ornament placed at the intersection of the ribs of ceilings, whether vaulted or flat, and in other situations.
(7): (n.) A wooden vessel for the mortar used in tiling or masonry, hung by a hook from the laths, or from the rounds of a ladder.
(8): (v. t.) To ornament with bosses; to stud.
(9): (n.) A head or reservoir of water.
Hastings' Dictionary of the Bible [2]
Boss . Only Job 15:26 , where it is doubtful whether metal bosses for strengthening the shield are implied in the figure, or whether we should render ‘the stout curves of his bucklers.’
Morrish Bible Dictionary [3]
A projection, sometimes rising to a sharp point, in the centre of a shield. Job 15:26 .
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [4]
(גִּב, gab, literally the back or gibbous part of any thing, spoken elsewhere of earthen bulwarks ["bodies"] or ramparts, Job 13:12; the vault ["eminent place," etc.] of a brothel, Ezekiel 16:24; 31:39; the eye- "brows," Leviticus 14:9; the rim or "nave" of a wheel, 1 Kings 7:33), the exterior convex part of a buckler, Job 15:26 (comp. Schultens, Comm. in loc.). (See Shield).
International Standard Bible Encyclopedia [5]
bos : Occurs only in the plural as a translation of גב , gabh = "arch," or "protuberance," referring to the curved ornaments of a shield ( Job 15:26 ), the central knob of the buckler.