bicyclic

/baɪˈsaɪklɪk/
adjective
  1. Having two cycles or rings, especially in chemistry (describing molecules with two fused rings) or in botany (describing flower parts arranged in two whorls).
    • Bicyclic compounds are common in organic chemistry.
    • Many pharmaceuticals contain a bicyclic structure.
    • The flower's petals are arranged in a bicyclic pattern.
Antonyms
What does "bicyclic" mean? | whatsthatwordmean | whatsthatwordmean