1. Of a chemical compound having a ring with four members
   - 4-membered

See also: membered

• Catasetum
• Catasetum macrocarpum
• catastrophe
• catastrophe theory
• catastrophic
• catastrophic illness
• catastrophically
• catastrophism
• catatonia
• catatonic
• catatonic schizophrenia
• catatonic type schizophrenia
• Catawba
• catbird
• catboat
• catbrier
• catcall
• catch
• catch a glimpse
• catch a wink
• catch cold
• catch crop
• catch fire
• catch it
• catch on