1610s, "to thrust forward or onward, to drive along;" 1640s, "to cause to stick out," from Latin protrudere "thrust forward; push out," from pro "forward" (see pro-) + trudere "to thrust, push," from PIE *treud- "to press, push, squeeze" (see threat). Intransitive meaning "jut out, bulge forth" recorded from 1620s. Related: Protruded; protruding.
Protozoa
protozoic
protract
protraction
protractor
protrude
protrusion
protuberance
protuberant
proud
proudly