Strong's #131: 'Adummiym (pronounced ad-oom-meem')
plural of 121; red spots; Adummim, a pass in Palestine:--Adummim.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
'ădûmmı̂ym
Adummim = "ruddy one: quieted ones?"
1) pass or ridge of hills, west of Gilgal
Part of Speech: noun proper locative
Relation: plural of H121
Usage:
This word is used 2 times:
Joshua 15:7: "Gilgal, that is before the going up to Adummim, which is on the south side"
Joshua 18:17: "Geliloth, which is over against the going up of Adummim, and descended of Bohan"