• Webster's Revised Unabridged Dictionary
    • n Urosome (Zoöl) The abdomen, or post-abdomen, of arthropods.
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Century Dictionary and Cyclopedia
    • n urosome In certain crustaceans, as the amphipods, the last three segments of the pleon or abdomen. Compare mesosome and metasome.
    • n urosome In biology: The last morphological segment of the tail; the terminal somatome of a vertebrate. See gephyrocercal.
    • n urosome The post-thoracic region of the body of arthropods; the abdomen or postabdomen as distinguished from the cephalothorax, and as composed of a series of urosomites or uromeres.
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Chambers's Twentieth Century Dictionary
    • n Urosome ū′rō-sōm the terminal somatome of a vertebrate: the post-thoracic region of the body of an arthropod
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Webster's Revised Unabridged Dictionary
2d uro-, + -some, body
Chambers's Twentieth Century Dictionary
Gr. oura, tail, sōma, body.