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, Ψrd
1. Upper case psi, the 23rd letter of the Greek alphabet.
2. Symbol for pseudouridine; psychology.


1. The 23rd letter of the Greek alphabet (ψ).
2. (ψ) Symbol for pseudouridine; pseudo-; wave function; the dihedral angle of rotation about the C1-Cα bond associated with a peptide bond.
3. Pounds per square inch.


pulmonary stenosis.


abbreviation for picosecond.


Abbreviation for:
pain score 
pap smear
papillary serous
paraffin section
paradoxical sleep
partial saturation
partial seizure
passive smoking
pathological stage
patient survey, see there 
peak systolic
per second
performance score
performance status
personal service personality scale
Pharmaceutical Services  
phosphatidyl serine
physical status
physiologic saline
pituitary stalk
plastic surgery
population spike
postmaturity syndrome
presenting symptom
pressure sore
pressure support
primitive streak
prognostic score
protamine sulphate
protein S
psychogenic seizure
pubertal stage
pulmonary sarcoidosis
pulmonary stenosis
pulmonary surfactant
pyloric sphincter
pyloric stenosis
pyriform sinus


the three Ps Endocrinology The association of pituitary adenoma, pancreatic neoplasia and parathyroid adenoma in multiple endocrine neoplasm, type I. See MEN 1 STD Permissiveness, promiscuity, ' pill'–3 factors associated with ↑rates of STDs in the 1960s.
References in periodicals archive ?
Politics can be a critical aspect of a pursuit and in some cases can be the most important of the three Ps.
Shortly after we moved in, I had a firsthand experience with the three Ps of advertising.
This fits in with the Three Ps challenge undertaken by the air ambulance every time it flies on an emergency mission: To Preserve life, Promote recovery and Prevent deterioration
It was Sheikh Mohammed's philosophy of the three Ps - preparation, planning and patience - that enabled Dubai Destination, who started at odds of 9-2, to come back.
However, while the three Ds apply only to cyclical downturns, the three Ps apply to both upturns and downturns as a tool for monitoring a potential cyclical upswing or downswing in real time.
We recognised that, in the words of Leighton chief executive officer Mr Wal King, to succeed in Asia you need to make a commitment to the three Ps -- presence, patience and persistence," Mr Combe said.
must have at least two of the three Ps in order to be satisfied at work and if