unneeded (iou) and Precipitin (medicine)

unneeded (iou)

unneeded adjective. M19.
[from UN-1 + needed pa. pple of NEED verb.]
Not needed.

Precipitin (medicine)

precipitin
<protein> Any antibody that forms a precipitating complex (a precipitin line) with an appropriate multivalent antigen. The term is now outmoded.

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