tris- en · X
Etymology
Borrowed from Ancient Greek τρῐ́ς (trĭ́s, “thrice”).
Meanings
- (morpheme, obsolete) A variant of tri- used to indicate that the component that does not take the prefix occurs three times in the compound: trisphosphuret of copper is PCu₃; trisbenzeneazoresorcinol, C₆H(OH)₂(N₂Ph)₃.
-
(morpheme) A variant of tri-, used for substitutions of three complex rather than simple units, as in,
tristhio-dimethyl-benzaldehyde, {C₆H₃(CH₃)₂CHS}₃
trisbenzene-azophenol, C₆H₂(N:NC₆H₅)₃OH