hemoglobin n.

word-forming element in pathology meaning "condition of the blood," Modern Latin combining form of Greek haima (genitive haimatos) "blood," a word of no established etymology (replacing the usual IE word, represented in Greek by ear; possibly from uncertain PIE root *sei- "to drip" (compare Old High German seim "virgin honey," Welsh hufen), but according to Beekes this proposal "cannot explain the Greek vocalism."

"small, spherical body; little globe or sphere," 1660s, from French globule, from Latin globulus "a little ball," diminutive of globus "round mass, sphere, ball" (see globe (n.)).

see hemoglobin; also see æ (1).