tumor (n.)

early 15c., from Latin tumor "swelling, condition of being swollen, a tumor," from tumere "to swell" (from PIE root *teue- "to swell").

*teuə-, also *teu-, Proto-Indo-European root meaning "to swell."

It forms all or part of: butter; contumely; creosote; intumescence; intumescent; protuberance; protuberant; psychosomatic; somato-; -some (3) "body, the body;" soteriology; Tartuffe; thigh; thimble; thousand; thole (n.); thumb; tumescent; tumid; tumor; truffle; tuber; tuberculosis; tumult; tyrosine.

It is the hypothetical source of/evidence for its existence is provided by: Avestan tuma "fat;" Greek tylos "callus, lump;" Latin tumere "to swell," tumidus "swollen," tumor "a swelling;" Lithuanian tukti "to become fat;" Lithuanian taukas, Old Church Slavonic tuku, Russian tuku "fat of animals;" Old Irish ton "rump."

chiefly British English spelling of tumor; see -or.

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Definitions of tumor

tumor (n.)

an abnormal new mass of tissue that serves no purpose;

From wordnet.princeton.edu

tumefaction

tumescence

tumescent

tumid

tummy

tumor

tumour

tumulous

tumult

tumultuous

tumulus