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.’
A. R. S. Kennedy.
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.