the GNU version of the Collaborative International Dictionary of English
adj. Suited for, or capable of, extension; extensible.
The Century Dictionary and Cyclopedia
In zoology and anatomy, capable of being extended; extensible; protrusile; adapted for stretching out.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. capable of being protruded or stretched or opened out
Word Usage
"The adult Pangolin has ho teeth, in consequence it cannot bite or eat hard food, and it has a long extensile tongue which can be protruded for a considerable distance through its small tube-like mouth."