anochromasia

1. Failure of cells or other elements of tissue to be colored in the usual manner when treated with a stain (or stains). 2. Accumulation of hemoglobin in the peripheral zone of erythrocytes, thereby resulting in a pale, virtually colorless central portion. [G. ano, upward, + chroma, color]

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ano·chro·ma·sia (an″o-kro-maґzhə) 1. absence of the usual staining reaction from a tissue or cell. 2. a condition in which the erythrocytes show a piling up of hemoglobin at the periphery so that the center is pale.