a. rare. [f. L. alluvi-um + -AN. Cf. mod.Fr. alluvien.] = ALLUVIAL.
1794. Sullivan, View Nat., I. 493. Alluvian mountains, as they are denominated, are evidently of posterior formation.
1866. J. Rose, Virgil Ecl. & Georg., 81. Such the alluvian mud by mountain rills Deposited o’er valleys from the hills.
