pa (
http://definr.com/pa)
n 1: an informal term for a father; probably derived from baby
talk [syn:
dad,
dada,
daddy,
papa,
pappa,
pater,
pop]
2: a short-lived radioactive metallic element formed from
uranium and disintegrating into actinium and then into
lead [syn:
protactinium,
protoactinium,
Pa, {atomic
number 91}]
3: a unit of pressure equal to one newton per square meter
[syn:
pascal,
Pa]
4: a Mid-Atlantic state; one of the original 13 colonies [syn:
Pennsylvania,
Keystone State,
PA]
5: an electronic amplification system used as a communication
system in public areas [syn:
public address system, {PA
system},
PA]