- transfuse (v.)
- "to transfer by pouring," early 15c., from Latin transfusus, past participle of transfundere "pour from one container to another," from trans- "across" (see trans-) + fundere "to pour" (see found (v.2)). Related: Transfused; transfusing.
- transfusion (n.)
- 1570s, "action of pouring liquid from one vessel to another," from Middle French transfusion and directly from Latin transfusionem (nominative transfusio) "a decanting, intermingling," noun of action from past participle stem of transfundere "pour from one container to another" (see transfuse). Sense of "transfering of blood from one individual to another" first recorded 1640s.