tam·a·rack \ˈtaməˌrak\noun (-s) Etymology: origin unknown 1. a. (1): any of several American larches; especially: a larch (Larix laricina) of northern U.S., Canada, and Alaska — called also American larch, black larch (2): the wood of the tamarack b.ortamarack pine: lodgepole pine 2.: mummy brown 2b