#rocker  a curved support that permits the supported object to rotate to and fro
  supertype:  #support.device  any device that bears the weight of another thing; "there was no place to attach supports for a shelf"
  part of:  #cradle  a baby bed with sides and rockers
  part of:  #hobby__hobbyhorse__rocking_horse__rockinghorse__cockhorse__stick_horse__stickhorse  a child's plaything consisting of an imitation horsehead on one end of a stick; the child straddles it an pretends to ride
  part of:  #rocking_chair__rockingchair__rocker  a chair mounted on rockers

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