n. 异种, 异质, 不同成分

[化] 不均匀性; 多相性

[ noun ]
the quality of being diverse and not comparable in kind
<noun.attribute>

Heterogeneity \Het`er*o*ge*ne"i*ty\, n. [Cf. F.
h['e]t['e]rog['e]n['e]it['e].]
The state of being heterogeneous; contrariety.

The difference, indeed the heterogeneity, of the two
may be felt. --Coleridge.