- oxidising capacity
- oxidising tendency
- one owning
- one who has lost his eye_ sight
- ornately
- over capacity
- on principle
- operetta
- one_for_one
- on balance
- oz
- out of turn
- orgasm
- obsessive compulsive psychoneurosis
- otamid
- oh! an exclamation of sorrow or wonder
- oh
- one who fixes a denture
- other things apart
- or whatever
- oracet blue b
- one to whom service is rendered
- one who awaits or hankers after the results of his deeds
- on bit
- outburn
- ostium urogenitale
- ophthalmo_eikonometer
- of young age
- on approval (purchases)
- of one hundred (as
- on oath
- one's virility to be on the decline
- one who narrates too many anecdotes
- orthognathous
- overwhelmed (by ecstatic emotion)
- one gifted with a sweet voice
- one who exploits one's vocal gifts (poet etc.)
- omni mane
- offset variable
- one of the two main divisions of literature in sanskrit poetics—literature that can be read and heard (the other being —literature that is to be presented on the stage)
- optical electropolarizer
- overwhelmed by joy
- one who saves somebody's life
- oxygen excess
- one's own name
- oxygen saturation
- oxgyen lack
- one's own right
- ozone layer
- ozone friendly