Interscendent
In`ter`scend´ent
a. 1. (Math.) Having exponents which are radical quantities; - said of certain powers; as, x?2, or x?a.
Interscendent series
a series whose terms are interscendent quantities.
- Hutton.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.