a-bomb
- n a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239)
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