MeSH definition : A group of AROMATIC HYDROCARBONS that have three rings joined as a triad around a
single carbon atom so all three are conjoined, in contrast to a linear arrangement
(ANTHRACENES) or angular arrangement (PHENANTHRENES).;
A group of AROMATIC HYDROCARBONS that have three rings joined as a triad around a
single carbon atom so all three are conjoined, in contrast to a linear arrangement
(ANTHRACENES) or angular arrangement (PHENANTHRENES).