The Collaborative International Dictionary of English v.0.48:

Distich \Dis"tich\, n. [L. distichon, Gr. ?, neut. of ? with two
   rows, of two verses; di- = di`s- twice + ? row, verse, fr. ?
   to ascend; akin to AS. st[imac]gan to ascend: cf. F.
   distique. See Stirrup.] (Pros.)
   A couple of verses or poetic lines making complete sense; an
   epigram of two verses. Distich

The Collaborative International Dictionary of English v.0.48:

Distich \Dis"tich\, Distichous \Dis"tich*ous\, a. [Gr. ?. See
   Distich, n.]
   Disposed in two vertical rows; two-ranked.
   [1913 Webster]

WordNet (r) 3.0 (2006):

distich
    n 1: two items of the same kind [syn: couple, pair,
         twosome, twain, brace, span, yoke, couplet,
         distich, duo, duet, dyad, duad]