pro·to·lan·guage 
(prōtō-lăng′gwĭj)
(prōtō-lăng′gwĭj)n.
A language that is the recorded or hypothetical ancestor of another language or group of languages. Also called Ursprache.
- systematist
- systematization
- systematize
- systematizer
- systemic
- systemically
- systemic circulation
- systemic lupus erythematosus
- systemization
- systemize
- systemizer
- system operator
- systems analysis
- systems analyst
- systems biology
- systems programming
- systole
- systolic
- systolic pressure
- syzygial
- syzygy
- Szczecin
- Szechuan
- Szechuan
- Szechuan pepper