早老 zǎolǎo premature aging Origin Definitions Defs Strokes Stroke Words Sentences Sents 早老性痴呆 zǎolǎoxìngchīdāi Alzheimer's disease a condition caused by brain disease characterized by memory loss, personality changes, and abnormal behavior早老素 zǎolǎosù presenilin presenilin; a type of protein associated with early-onset Alzheimer's disease