also am·track A0268600 (ăm′trăk′)n. A small, flatbottom amphibious vehicle that moves by means of finned tracks and is used to carry troops from ship to shore.[am(phibious) + trac(tor).]
amtrac
(ˈæmˌtræk) or
amtrack
nan amphibious tracked vehicle used primarily by the military for shore landingsFinancialSeeAmtrak