1. A being found only occasionally in underground passages: Sam, the park naturalist, was charting the number of different trogloxenes who live from time to time in the caves, including hikers who get lost and sleep in them overnight.
2. A cavern guest; an animal that spends occasionally short periods in dark recesses: Hibernating bears are a common form of trogloxene, spending part of the winter season in large holes, or dens, in mountains or underground.