OP

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OP

OP

Abbreviation for:
occiput posterior
occipitoparietal
occlusal plane
oesophagopharyngeal
off pump
olfactory pit
oncotic pressure
opening pressure
operative procedure
opium, see there
opponens pollicis
opposite
organising pneumonia
organophosphate
oropharyngeal
osmotic pressure
osteopontin
osteopaenia
osteoporosis
oxidative phosphorylation
outpatient, see there

OP

Drug slang A street term for opium. See Opium Managed care Outpatient, see there.

OP

Abbreviation for occipitoposterior position.

OP

see OSMOTIC PRESSURE.
References in periodicals archive ?
OPS also can't know of all the leaks and damage because operators don't have to report spills of less than 21,000 gallons (50 barrels).
Jim Pates has experienced OPS' indifference to pipeline safety and environmental concerns firsthand.
OPS ordered Colonial to reduce pressure in the line, but still won't make the company fix it and Pates fears another crack could cause another water outage.