ter·gum 
(tûrgəm)
(tûrgəm)n. pl. ter·ga (-gə)
The dorsal portion of a body segment of an arthropod.
[Latin, back.]
tergal (-gəl) adj.
- irrefragability
- irrefragable
- irrefragably
- irrefrangible
- irrefrangibly
- irrefutability
- irrefutable
- irrefutably
- irreg.
- irregardless
- irregular
- irregular galaxy
- irregularity
- irregularly
- irrelative
- irrelatively
- irrelevance
- irrelevancy
- irrelevant
- irrelevantly
- irreligion
- irreligious
- irreligiously
- irreligiousness
- irremeable