sem·i·au·to or sem·i-au·to 
(sĕmē-ô′tō, sĕmī-) Informal
(sĕmē-ô′tō, sĕmī-) Informal adj.
Semiautomatic.
n. pl. sem·i·au·tos
A semiautomatic firearm.
- masterfully
- masterfulness
- master gunnery sergeant
- master key
- masterliness
- masterly
- master mariner
- master mason
- mastermind
- master of ceremonies
- masterpiece
- master plan
- master race
- master's
- Masters
- Masters
- masters-at-arms
- master's degree
- master sergeant
- mastership
- mastersinger
- Masterson
- masterstroke
- masterwork
- mastery