pro·to·gal·ax·y 
(prōtō-găl′ək-sē)
(prōtō-găl′ək-sē)n. pl. pro·to·gal·ax·ies
A cloud of gas, primarily hydrogen, that is forming a galaxy or has sufficient mass to eventually form a galaxy.
- shakedown
- shaken
- shaken baby syndrome
- shaken infant syndrome
- shake off
- shake out
- shakeout
- shaker
- shake (someone's) tree
- shake someone's tree
- Shakespeare
- Shakespearean
- Shakespeareana
- Shakespearean sonnet
- Shakespearian
- Shakespeariana
- shake tree
- shake up
- shakeup
- shakily
- shakiness
- shaking palsy
- shako
- Shakta
- Shakti