i 1 m 3 m 3 u 1 n 1 o 1 h 4 i 1 s 1 t 1 o 1 c 3 h 4 e 1 m 3 i 1 s 1 t 1 r 1 i 1 e 1 s 1
22 letters · 36 points in Scrabble
Meaning
noun an assay that shows specific antigens in tissues by the use of markers that are either fluorescent dyes or enzymes (such as horseradish peroxidase)