in physiology, "colorless fluid found in animal bodies," 1725, from French lymphe (16c.), from Latin lympha "water, clear water, a goddess of water," variant of lumpæ "waters," altered by influence of Greek nymphē "goddess of a spring, nymph."
The same word was used earlier in English in the classical sense "pure water, water" (1620s) and with reference to colorless fluids in plants (1670s). Also see lymphatic. Lymph node is attested by 1874.
word-forming element, from Greek -oma, with -o-, lengthened stem vowel + -ma, suffix forming neuter nouns and nouns that indicate result of verbal action (equivalent of Latin -men); especially taken in medical use as "morbid growth, tumor," based on sarcoma, carcinoma.
<a href="https://www.etymonline.com/word/lymphoma">Etymology of lymphoma by etymonline</a>
Harper, D. (n.d.). Etymology of lymphoma. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/lymphoma