adj. Between phalanges, as with an interphalangeal joint.
the GNU version of the Collaborative International Dictionary of English
adj. Between phalanges.
The Century Dictionary and Cyclopedia
Situated between any two successive phalanges of a finger or toe; nodal, of a digit: as, an interphalangeal articulation (one of the joints of a finger or toe).
Word Usage
"While Emma was gone, I removed each of the right digits at the level of the first interphalangeal joint."