Definition of orthoform in English:

orthoform

Pronunciation /ˈɔːθə(ʊ)fɔːm/

noun

rare Pharmacology
  • Either of two isomeric compounds used as local anaesthetics and having the formula C₈ H₉ NO₃, respectively the methyl esters of 3-amino-4-hydroxybenzoic acid and (originally) 4-amino-3-hydroxybenzoic acid.

Origin

Late 19th century; earliest use found in The Lancet. From ortho- + -form, after German Orthoform.