a-line
- n women's clothing that has a fitted top and a flared skirt that is widest at the hemline
a-scan ultrasonography
- n the use of ultrasonography to measure the length of the eyeball
a-team
- n a group of elite soldiers or a leadership group of advisors or workers in an organization
a. a. michelson
- n United States physicist (born in Germany) who collaborated with Morley in the Michelson-Morley experiment (1852-1931)