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a combining form meaning “loin,” used in the formation of compound words:

word-forming element meaning “loin, loins,” from comb. form of Latin lumbus (see lumbago).


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  • Lumbocolostomy

    lumbocolostomy lum·bo·co·los·to·my (lŭm’bō-kə-lŏs’tə-mē) n. The formation of a permanent opening into the colon through an incision in the lumbar region.

  • Lumbocostal

    lumbocostal lum·bo·cos·tal (lŭm’bō-kŏs’təl) adj. Relating to the lumbar and hypochondriac regions.

  • Lumbocostal ligament

    lumbocostal ligament n. A strong band that unites the twelfth rib with the tips of the transverse processes of the first and second lumbar vertebrae.

  • Lumbocostoabdominal triangle

    lumbocostoabdominal triangle lum·bo·cos·to·ab·dom·i·nal triangle (lŭm’bō-kŏs’tō-āb-dŏm’ə-nəl) n. An irregular area bounded by the inferior posterior serratus muscle, the abdominal internal and external oblique muscles, and the erector muscle of the spine.

Disclaimer: Lumbo- definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.