'thopter
'thopters are aerial Imperial aircraft, that have different models. Some worlds are able to produce their own native models of the aircraft.[1]
Trivia
The spelling is as it appears in Warhammer 40,000 Chapter Approved - The Book of the Astronomican.[1]
Sources
- 1: Warhammer 40,000 Chapter Approved - The Book of the Astronomican, pg. 102 - Army Lists