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 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