tetradic, a.
(tɪˈtrædɪk)
[f. tetrad + -ic. Cf. F. tétradique (in Cotgr.).]
a. Of, pertaining to, or of the nature of a tetrad.
| 1788 T. Taylor Proclus (1792) I. 179 The tetradic ternary, and the triadic quaternary. a 1914 C. S. Peirce Coll. Papers (1935) VI. 222 A tetradic, pentadic, etc. relationship is of no higher nature than a triadic relationship. 1921 [see monadic a. 1 b]. |
b. Chem. That is a tetrad; tetravalent.
| 1868 Fownes' Chem. (ed. 10) 257. 1872 Watts Dict. Chem. VI. 237 Carbon, which combines with 4 atoms of hydrogen, is tetratomic, tetradic, or quadrivalent. 1877 ― Fownes' Chem. (ed. 12) I. 267 With silver..it [oxygen] forms the two oxides, Ag2O and Ag4O, in the latter of which it is tetradic. |
c. Anc. Pros. (a) Containing four different metres or rhythms. (b) Composed of groups of systems, each of which contains four unlike systems.
| 1891 in Cent. Dict. |