Noun rattler has 2 senses
  1. rattlesnake, rattler - pit viper with horny segments at the end of the tail that rattle when shaken
    --1 is a kind of pit viper
    --1 is a member of Crotalidae, family Crotalidae
    --1 has parts: rattle
    --1 has particulars:
     diamondback, diamondback rattlesnake, Crotalus adamanteus; timber rattlesnake, banded rattlesnake, Crotalus horridus horridus; prairie rattlesnake, prairie rattler, Western rattlesnake, Crotalus viridis; sidewinder, horned rattlesnake, Crotalus cerastes; Western diamondback, Western diamondback rattlesnake, Crotalus atrox; rock rattlesnake, Crotalus lepidus; tiger rattlesnake, Crotalus tigris; Mojave rattlesnake, Crotalus scutulatus; speckled rattlesnake, Crotalus mitchellii; massasauga, massasauga rattler, Sistrurus catenatus; ground rattler, massasauga, Sistrurus miliaris
    Derived form: verb rattle2
  2. freight train, rattler - a railroad train consisting of freight cars
    --2 is a kind of train, railroad train
    --2 has members: cabin car, caboose; freight car
    --2 has particulars: freight liner, liner train
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