[pol-ee-sahy-klik, -sik-lik] /ˌpɒl iˈsaɪ klɪk, -ˈsɪk lɪk/

adjective, Chemistry.
pertaining to an organic compound containing several atomic rings, usually fused.
(of a molecule or compound) containing or having molecules that contain two or more closed rings of atoms
(biology) having two or more rings or whorls: polycyclic shells, a polycyclic stele
a polycyclic compound: anthracene is a polycyclic
(pŏl’ĭ-sī’klĭk, -sĭk’lĭk)
Having two or more atomic rings in a molecule. Steroids are polycyclic compounds.


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  • Polycystic

    /ˌpɒlɪˈsɪstɪk/ adjective 1. (med) containing many cysts: a polycystic ovary polycystic pol·y·cys·tic (pŏl’ē-sĭs’tĭk) adj. Having or containing many cysts.

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