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Definition of Pa
1. Noun. An informal term for a father; probably derived from baby talk.
2. Noun. A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
Exact synonyms: Atomic Number 91, Protactinium, Protoactinium
Generic synonyms: Metal, Metallic Element
Generic synonyms: Metal, Metallic Element
3. Noun. A unit of pressure equal to one newton per square meter.
4. Noun. A Mid-Atlantic state; one of the original 13 colonies.
Exact synonyms: Keystone State, Pennsylvania
Geographical relationships: Battle Of Gettysburg, Gettysburg
Terms within: Penn, Pennsylvania, University Of Pennsylvania, Allentown, Altoona, Bethlehem, Erie, Gettysburg, Capital Of Pennsylvania, Harrisburg, Chester, City Of Brotherly Love, Philadelphia, Pittsburgh, Alleghenies, Allegheny Mountains, Allegheny, Allegheny River, Blue Ridge, Blue Ridge Mountains, Lehigh River, Monongahela, Monongahela River, Susquehanna, Susquehanna River
Generic synonyms: American State
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa, Mid-atlantic States
Geographical relationships: Battle Of Gettysburg, Gettysburg
Terms within: Penn, Pennsylvania, University Of Pennsylvania, Allentown, Altoona, Bethlehem, Erie, Gettysburg, Capital Of Pennsylvania, Harrisburg, Chester, City Of Brotherly Love, Philadelphia, Pittsburgh, Alleghenies, Allegheny Mountains, Allegheny, Allegheny River, Blue Ridge, Blue Ridge Mountains, Lehigh River, Monongahela, Monongahela River, Susquehanna, Susquehanna River
Generic synonyms: American State
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa, Mid-atlantic States
5. Noun. An electronic amplification system used as a communication system in public areas.
Exact synonyms: P.a., P.a. System, Pa System, Public Address System
Terms within: Amplifier, Loudspeaker, Loudspeaker System, Speaker, Speaker System, Speaker Unit, Tannoy
Generic synonyms: Communication System
Terms within: Amplifier, Loudspeaker, Loudspeaker System, Speaker, Speaker System, Speaker Unit, Tannoy
Generic synonyms: Communication System
Definition of Pa
1. n. A shortened form of Papa.
Definition of Pa
1. a father [n -S]
Medical Definition of Pa
1. A physician's assistant or, in anatomy, pa stands for posteroanterior: from back-to-front. See: pa X-ray. (12 Dec 1998)