Strong's #2805: chesheb (pronounced khay'-sheb)
 from 2803; a belt or strap (as being interlaced):--curious girdle.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ 
  chêsheb 
 
 1) girdle, band, ingenious work
 
 1a) ingenious work - the name of the girdle or band of the ephod
 
  Part of Speech: noun masculine
Relation: from H2803
Usage:
This word is used 8 times:
Exodus 28:8: " And the curious girdle of the ephod, which is upon it, shall be of the same, according to the work thereof; even of gold,"
Exodus 28:27: "toward the forepart thereof, over against the other coupling thereof, above  the curious girdle of the ephod."
Exodus 28:28: "with a lace of blue, that it may be above  the curious girdle of the ephod, and that the breastplate be not"
Exodus 29:5: "and the ephod, and the breastplate, and gird  him with the curious girdle of the ephod:"
Exodus 39:5: " And the curious girdle of his ephod, that was upon it, was of the same, according to the work thereof; of gold,"
Exodus 39:20: "toward the forepart of it, over against the other coupling thereof, above  the curious girdle of the ephod."
Exodus 39:21: "with a lace of blue, that it might be above  the curious girdle of the ephod, and that the breastplate might not"
Leviticus 8:7: "the ephod upon him, and he girded  him with the curious girdle of the ephod, and bound"