Third-person singular simple present indicative form of degenerate.
In young birds both oviducts are almost equal in size, but the right soon degenerates into an insignificant strand.
Of course a discussion as to the mere application of a word easily degenerates into the most fruitless logomachy.
A salivary gland degenerates when its nerve-supply is cut off.
On the other hand, in some neurons, after severance of the axon from the rest of the cell (spinal motor cell), the whole nerve cell as well as the severed axon degenerates, and may eventually die and be removed.
Acuteness degenerates into hair-splitting and clever plays on words after the manner of the rabbins.