For other uses, see Killeen (disambiguation). Killeen is a city in Bell County, Texas, United States. According to the recent populations estimates, the city's population was 140,806, making it the 21st most populous city in Texas. It is the principal city of the KilleenâTempleâFort Hood Metropolitan Statistical Area.
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[gwiÂ´ak] a resin from certain Caribbean trees, used as a reagent. guaiac test one for occult blood; glacial acetic acid and guaiac are mixed with the specimen; on addition of hydrogen peroxide, the presence of blood is indicated by a blue tint.