cockle
     n 1: common edible European bivalve
     2: common edible European bivalve mollusk having a rounded
        shell with radiating ribs
     v 1: stir up (water) so as to form ripples [syn: {ripple}, {ruffle},
           {riffle}, {undulate}]
     2: to gather something into small wrinkles or folds; "She
        puckered her lips" [syn: {pucker}, {rumple}, {crumple}, {knit}]
Source: WordNet® 2.0