| 释义 |
artiad Chem.|ˈɑːtɪəd|
[f. Gr. ἄρτι-ος even + -ad 1 a.]
A chemical element or radical with even degrees of quantivalency or atomicity, e.g. a dyad, tetrad, or hexad, in opposition to perissads, which include monads, triads, and pentads.
1870Watts Dict. Chem. VI. 238 The elements may be divided in this respect into two classes, one of odd, the other of even equivalence, the former distinguished as perissads, the latter as artiads. |