os pe·nis 
(ŏs pēnĭs)
(ŏs pēnĭs)n.
See baculum.
[New Latin os pēnis : Latin os, bone + Latin pēnis, genitive of pēnis, penis.]
- thiopental sodium
- thiophene
- thioridazine
- thiosulfate
- thiosulfuric acid
- thiotepa
- thiothixene
- thiouracil
- thiourea
- third
- third base
- third baseman
- third class
- third-class
- third degree
- third-degree burn
- third dimension
- third-dimensional
- third estate
- third eye
- third eyelid
- third force
- thirdhand
- third home
- third house