polycyclic

/pol-ee-sahy-klik, -sik-lik/US // ˌpɒl iˈsaɪ klɪk, -ˈsɪk lɪk //UK // (ˌpɒlɪˈsaɪklɪk) //

多环,多环类,多环素

Definitions

adj.形容词 adjective

1
Chemistry.
- : pertaining to an organic compound containing several atomic rings, usually fused.

Of particular concern was a smaller class of particle pollution known as PAHs, or polycyclic aromatic hydrocarbons.
That must be that polycyclic screen that Conway reported on.
"That must be that sixth-phase polycyclic screen that Conway reported on," Cleveland frowned in thought.
Pierced Roger's polycyclic screen; exposed the bare metal of Roger's walls!