Source : Webster's Revised Unabridged Dictionary (1913)

Seersucker \Seer"suck`er\, n.
   A light fabric, originally made in the East Indies, of silk
   and linen, usually having alternating stripes, and a slightly
   craped or puckered surface; also, a cotton fabric of similar
   appearance.

Source : WordNet®

seersucker
     n : a light puckered fabric (usually striped)