伪阴性 wěiyīnxìng false negative Origin Definitions Defs Strokes Stroke Words Sentences Sents 伪 偽 wěi nounverb false (bound form) false; fake; forged; bogus; pseudo-阴性 陰性 yīnxìng adjective negative The result of a medical test or screening showing that a specific condition, pathogen, or reaction is not present.