O-P

O2

oxygen

OA

osteoarthritis

Ob, obs

obstetrics

OBRA

Omnibus Budget Reconciliation Act

OD

right eye

od

overdose

oint

ointment

OOB

out of bed

O & P

ova and parasites

OP

outpatient

OR

operating room

Ortho

orthopedics

OS

left eye

os

mouth

OSHA

Occupational Safety and Health Administration

OT

occupational therapy

OTC

over the counter

OU

both eyes

oz

ounce

p

after

P

pulse, Phosphorus

PA

physicians’ assistant

Path

pathology

PACU

post-anesthesia care unit

PAP

pap smear, cervical smear

pc

after meals

PCC

poison control center

PCT

patient care technician

PDR

Physicians Desk Reference

PE

pulmonary embolism

Peds

pediatrics

per

by, through

PET

positron emission tomography

pH

measure of acidity/alkalinity

Pharm

pharmacy

PID

pelvic inflammatory disease

PM/pm

after noon, evening

PMS

premenstrual syndrome

PNS

peripheral nervous system

po

by mouth

post

after, posterior

post-op

after an operation

PPE

personal protective equipment

pre

before

pre-op

before an operation

prep

prepare

prn

as needed, whenever necessary

PROM

passive range of motion

PT

physical therapy, therapist

pt

patient, pint

PVD

peripheral vascular disease

ocul

eye

odont

tooth

olig

few, less than normal, small

-ologist

person who does/studies

-ology

study of, science of

-oma

tumor, a swelling

onco

mass, bulk, tumor

oophor

ovary, female egg cell

opthalm-

eye

opia

vision

opsy

to view

opt

vision, eye

or

mouth

orch

testicle, testes

-orrhea

flow, discharge

orth-

normal, straight

ost-

bone

-oscopy

diagnostic examination

-osis

condition, state, process

ot-

ear

otic

pertaining to a condition

-otomy

cutting into

-ous

full of, containing, pertaining to, condition

ovi, ovario

egg, female sex gland, ovary

pan-

all, complete, entire

pancreat

pancreas

para-

near, beside, beyond, abnormal, lower half of the body

paresis

paralysis

partum

birth, labor

path

disease, abnormal condition

ped

child

penia

lack of, abnormal reduction in number, deficiency

pent

five

pepsia, pesis

digestion

per

through, by, excessive

peri

around

pexy

fixation

phag

eat, ingest

phage, phagia

to eat, consuming, swallow

pharyng

pharynx, throat

phas, phasia

speech

philia, phlic

affinity for, attracted to

phleb

vein

phobia

fear

phon

sound, voice

phylaxis

protection, prevention

plasty

surgical correction or repair

plegia

paralysis

pleuro

side, rib