To treat a patient or a medical sample with heparin to prevent blood from clotting.
From 'heparin' plus the verb-forming suffix '-ize' (to make or treat with something). This term became standard medical vocabulary in the 20th century as heparin became widely used.
When doctors heparinize a blood sample, they're essentially time-freezing the blood's chemistry—without it, donated blood tubes would clot immediately and become useless for testing!
Complete word intelligence in one call. Free tier — 50 lookups/day.