pre·op·er·a·tive 
(prē-ŏpər-ə-tĭv, -ŏprə-, -ŏpə-rā′-)
(prē-ŏpər-ə-tĭv, -ŏprə-, -ŏpə-rā′-)adj.
Occurring before surgery: preoperative preparations.
pre·oper·a·tive·ly adv.
- subsp.
- subspecialist
- subspecialization
- subspecialize
- subspecialty
- subspecies
- subspecific
- subst.
- substage
- substance
- substance abuse
- substance abuser
- substance P
- substance use disorder
- substandard
- substantia gelatinosa
- substantial
- substantiality
- substantially
- substantialness
- substantia nigra
- substantiate
- substantiation
- substantival
- substantivally