Similar to that of a fish; as, fishlike scales, fishlike eyes(adjective)
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Use "fishlike" in a sentence
"How often as a boy had he been rapped into a galvanic activity out of the deep reveries he used to fall into -- those fits of a kind of fishlike day-dream."
"We watched him move around, fishlike, on the sonogram."
" As you watch, he becomes ever smaller, less defined, finally a little fishlike creature, then a blob, and finally a few cells that dwindle on the floor and disappear."