1. acid-fast - Adjective
2. acid-fast - Adjective Satellite
not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)
Source: WordNetA chest X-ray and multiple sputum cultures for acid-fast bacilli are typically part of the initial evaluation. Source: Internet
Positive skin smears: In some case, acid-fast leprosy bacilli are considered diagnostic; however, the diagnosis is clinical. Source: Internet