PLAB or Plab may refer to:
Science and technology
- GDF15 (Growth/differentiation factor 15), a protein
- Photronics Inc (NASDAQ: PLAB), an American semiconductor photomask manufacturer
- Phospholipase A<!--fails WP:DABACRO / WP:DABMENTION-->
- Professional and Linguistic Assessments Board, a UK medical test
Other uses
- Pimsleur Language Aptitude Battery, a foreign language test
- Paya Lebar Air Base, a military airbase in Singapore
- Darrin Plab (born 1970), retired American high jumper