1. Of a chemical compound having a ring with five members
   - 5-membered

See also: membered

• black elderberry
• Black English
• Black English Vernacular
• black eye
• black felt cup
• black flag
• Black Forest
• Black Forest gateau
• black fox
• black fritillary
• black gold
• black grama
• black greasewood
• black grouse
• black guillemot
• black gum
• Black Hand
• black haw
• Black Hawk
• black hellebore
• black hemlock
• black henbane
• black hickory
• Black Hills
• black hole