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Use "protrusible" in a sentence
"She eats bugs & catches them by sight, smell or by tasting them with her protrusible, deeply forked tongue."
"This is typically a protrusible penis-like structure that may be armed with hooks."
"Body more or less flask-shape, two or three times as long as broad, with conical apex, which is slightly elastic and protrusible; surface obliquely striate, with well-defined lines, 14 to 16 in number; cilia uniform on the body, with a crown of longer ones at the base of the conical proboscis."