psi

English Thesaurus

1. the 23rd letter of the Greek alphabet (noun.communication)

hypernym	:	alphabetic character, letter, letter of the alphabet,
definition	:	the conventional characters of the alphabet used to represent speech (noun.communication)

member meronym	:	greek alphabet,
definition	:	the alphabet used by ancient Greeks (noun.communication)

2. a unit of pressure (noun.quantity)

hypernym	:	pressure unit,
definition	:	a unit measuring force per unit area (noun.quantity)