cy·clo·ser·ine 
(sī′klō-sĕrēn)
(sī′klō-sĕrēn)n.
An antibiotic effective against a wide range of bacteria, used especially in the treatment of tuberculosis and infections of the urinary tract.
- protohistorian
- protohistoric
- protohistory
- protohuman
- Proto-Indo-European
- protolanguage
- protolithic
- protomartyr
- protomorph
- protomorphic
- proton
- protonema
- protonemal
- protonematal
- protonic
- protonotary
- protonotary
- protonotary apostolic
- proton-proton chain
- proton pump inhibitor
- proton synchrotron
- proto-oncogene
- protopathic
- protopathy
- protoplanet