Trans is a Latin noun or prefix, meaning "across", "beyond" or "on the opposite side [of]" . It is the opposite of cis, which means "on the same side [of]". In chemistry, a double bond (or ring) not subject to free rotation in which the greater radical on both ends is on the opposite side of the bond (or face of the ring) is called trans. Compare with cis. In molecular and cellular biology, external factors which act on a molecule (for example, intermolecular interactions) are considered to ac… (More on Trans)