breastplate, coat of mail, habergeon, harness

Boyd’s Bible Dictionary:

The breastplate of the high priest (Ex. 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. 28:28). Adorned with 12 precious stones (Ex. 28:12-29).

“Breastplate” From Concise Bible Dictionary:

Armor for the breast.
1. Of righteousness (for Christ) (Isa. 59:17); (for the Christian’s conflict in the heavenlies) (Eph. 6:14).
2. Of faith and love (for the wilderness) (1 Thess. 5:8).
3. Of iron (steeled conscience) (Rev. 9:9).
4. Of fire, jacinth, and brimstone (dire judgments) (Rev. 9:17). See ARMOR.
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