The Collaborative International Dictionary of English v.0.48:
half-track \half-track\, half-tracked \half-tracked\adj. having caterpillar treads on the rear and wheels in front; as, half-track armored vehicles. Syn: half-track. [WordNet 1.5]WordNet (r) 3.0 (2006):
half-tracked adj 1: having caterpillar treads on the rear and wheels in front; "half-track armored vehicles" [syn: half-track, half-tracked]