liquid human serum

liq·uid hu·man se·rum

the pool of fluids separated from blood withdrawn from human subjects and allowed to clot in the absence of any anticoagulant; not more than 10 separate donations are pooled; the contributions from donors of A, O, and either B or AB groups are represented in approximately the ratio 9:9:2.

liq·uid hu·man se·rum

(likwid hyūmăn sērŭm)
Pool of fluids separated from blood withdrawn from human subjects and allowed to clot in the absence of any anticoagulant.
References in periodicals archive ?
Using liquid human serum samples, the situation is quite different.