Noun mound builder has 2 senses
  1. Mound Builder - prehistoric Amerindians who built altar mounds
    --1 is a kind of
    primitive, primitive person
  2. megapode, mound bird, mound-bird, mound builder, scrub fowl - large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs
    --2 is a kind of gallinaceous bird, gallinacean
    --2 is a member of Megapodiidae, family Megapodiidae
    --2 has particulars:
     mallee fowl, leipoa, lowan, Leipoa ocellata; brush turkey, Alectura lathami; maleo, Macrocephalon maleo
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