| ACICULAE | • aciculae n. Plural of acicula. • ACICULA n. (Latin) a needlelike bristle or spine. | 
| ACICULAR | • acicular adj. Needle-shaped; slender like a needle or bristle. • acicular adj. Having sharp points like needles. • acicular adj. (Botany) Of a leaf, slender and pointed, needle-like. | 
| ACICULAS | • aciculas n. Plural of acicula. • ACICULA n. (Latin) a needlelike bristle or spine. | 
| ACICULUM | • aciculum n. (Botany, zoology) A needlelike spine or bristle, specially the seta of an annelid. • ACICULUM n. (Latin) a bristlelike part. | 
| ACIDEMIA | • acidemia n. Alternative form of acidaemia. • ACIDEMIA n. a condition of increased acidity of the blood. | 
| ACIDHEAD | • acidhead n. (Slang, derogatory) A person who uses the hallucinogenic drug LSD. • ACIDHEAD n. a person who takes hallucinogenic drugs. | 
| ACIDIEST | • acidiest adj. Superlative form of acidy: most acidy. • ACIDY adj. resembling acid, sour. | 
| ACIDNESS | • acidness n. Acidity, sourness. • ACIDNESS n. acidity; sourness. | 
| ACIDOSES | • acidoses n. Plural of acidosis. • ACIDOSIS n. the presence of abnormal acid in the blood. | 
| ACIDOSIS | • acidosis n. (Pathology) An abnormally increased acidity of the blood. • ACIDOSIS n. the presence of abnormal acid in the blood. | 
| ACIDOTIC | • acidotic adj. (Pathology) Having depressed alkalinity of blood or tissue. • ACIDOTIC adj. pertaining to an abnormal blood acid. | 
| ACIDURIA | • aciduria n. (Medicine) The presence of an acid in the urine. • ACIDURIA n. excessive acid in the urine. | 
| ACIERAGE | • acierage n. (Historical) The process of electroplating a copper engraving with iron or steel. • ACIERAGE n. (French) the covering of a metal plate with an iron film. | 
| ACIERATE | • acierate v. (Rare, transitive) To convert (iron) into steel, or to coat with a layer of steel by converting only… • ACIERATE v. to turn into steel. |