the GNU version of the Collaborative International Dictionary of English
adj. Capable of being protracted, or protruded; protrusile.
The Century Dictionary and Cyclopedia
Susceptible of being drawn forward or thrust out, as the tongue of a woodpecker; protrusile: correlated with retractile, that which is one being also the other.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. able to be extended
Word Usage
"If in the free (protractile) portion of the penis, that organ is to be withdrawn from its sheath until the nodule is exposed and can be incised."