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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 ?
With that in mind, a review of an active manager's performance based on adherence to the Three Ps enforced by a fire-and-replace investment policy becomes not only a waste of time, but also an imprudent waste of beneficiaries' money.
The use of the three Ps is not restricted to business cycle expansions and recessions for a national economy.
For an analyst looking at cyclical data, an analysis of the three Ps is a simple but useful way to tell in real time whether a cyclical upswing or downswing has started.
Hopefully by following the three Ps you can begin to deal with any pressurised situations.
Godolphin founder Sheikh Mohammed said: 'The result of 100 Group Ones has comes from the three Ps --planning, preparation and patience.
Godolphin founder Sheikh Mohammed expressed his delight at the landmark on their official website, saying: 'The result of 100 Group Ones has comes from the three Ps - planning, preparation and patience.
When the Sheikh began the Godolphin operation, he had the maxim of the three Ps and they have certainly paid off with this horse,' said Godolphin racing manager Simon Crisford.
THE key is the three Ps - Practice, Preparation and Presentation.