adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   a microbe which lives deep underground
2. 2
   any of a race of sapient beings who live inside the Earth and operate UFOs

Adjective

1. 1
   Living deep underground. not-comparable

Etymology

From intra- + terrestrial.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.