Resembling or characteristic of a sucker (sucking organ or body part).(adjective)
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Use "suckerlike" in a sentence
"All around it were a couple dozen suckerlike orifices—the source of the tongue-legs."
"His quarry is often carp, a hardy relative of the goldfish with a suckerlike mouth and a coat of viscous slime."
"Their large, suckerlike mouths were ringed with sharp teeth, and when one latched on to a leg or arm, its head had to be cut off and the teeth pried open with a knife."