breastplate, coat of mail, habergeon, harness

Boyd’s Bible Dictionary:

The breastplate of the high priest (Ex. 28:1515And thou shalt make the breastplate of judgment with cunning work; after the work of the ephod thou shalt make it; of gold, of blue, and of purple, and of scarlet, and of fine twined linen, shalt thou make it. (Exodus 28:15)), was of embroidered stuff, some 10 inches square; its upper corners fastened with gold or lace to the ephod, its lower to the girdle (Ex. 28:2828And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be above the curious girdle of the ephod, and that the breastplate be not loosed from the ephod. (Exodus 28:28)). Adorned with 12 precious stones (Ex. 28:12-2912And thou shalt put the two stones upon the shoulders of the ephod for stones of memorial unto the children of Israel: and Aaron shall bear their names before the Lord upon his two shoulders for a memorial. 13And thou shalt make ouches of gold; 14And two chains of pure gold at the ends; of wreathen work shalt thou make them, and fasten the wreathen chains to the ouches. 15And thou shalt make the breastplate of judgment with cunning work; after the work of the ephod thou shalt make it; of gold, of blue, and of purple, and of scarlet, and of fine twined linen, shalt thou make it. 16Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof. 17And thou shalt set in it settings of stones, even four rows of stones: the first row shall be a sardius, a topaz, and a carbuncle: this shall be the first row. 18And the second row shall be an emerald, a sapphire, and a diamond. 19And the third row a ligure, an agate, and an amethyst. 20And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings. 21And the stones shall be with the names of the children of Israel, twelve, according to their names, like the engravings of a signet; every one with his name shall they be according to the twelve tribes. 22And thou shalt make upon the breastplate chains at the ends of wreathen work of pure gold. 23And thou shalt make upon the breastplate two rings of gold, and shalt put the two rings on the two ends of the breastplate. 24And thou shalt put the two wreathen chains of gold in the two rings which are on the ends of the breastplate. 25And the other two ends of the two wreathen chains thou shalt fasten in the two ouches, and put them on the shoulderpieces of the ephod before it. 26And thou shalt make two rings of gold, and thou shalt put them upon the two ends of the breastplate in the border thereof, which is in the side of the ephod inward. 27And two other rings of gold thou shalt make, and shalt put them on the two sides of the ephod underneath, toward the forepart thereof, over against the other coupling thereof, above the curious girdle of the ephod. 28And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be above the curious girdle of the ephod, and that the breastplate be not loosed from the ephod. 29And Aaron shall bear the names of the children of Israel in the breastplate of judgment upon his heart, when he goeth in unto the holy place, for a memorial before the Lord continually. (Exodus 28:12‑29)).

“Breastplate” From Concise Bible Dictionary:

Armor for the breast.
Medieval Breastplates

“Coat of Mail” From Concise Bible Dictionary:

See Armor.

Strong’s Dictionary of Hebrew Words:

Transliteration:
shiryown
Phonic:
shir-yone’
Meaning:
or shiryon {shir-yone'}; and shiryan {shir- yawn'}; also (feminine) shiryah {shir-yaw'}; and shiryonah {shir-yo-naw'}; from 8281 in the original sense of turning; a corslet (as if twisted)
KJV Usage:
breastplate, coat of mail, habergeon, harness. See 5630