diagnosticKK [ˏdaɪəgˋnɑstɪk] /ˌdaɪəɡˈnɑstɪk/發音dia- 穿過、貫通+gnost 知道、認識+-ic 形容詞→透徹知曉的展開收合dia-字首穿過、貫通gnost字根知道、認識-ic字尾形容詞字面：透徹知曉的把情況看透、辨識清楚，即用於診斷、檢測。形容詞1診斷的、診斷用的醫學The doctor ordered several diagnostic tests before deciding on treatment.醫師在決定療程前安排了幾項診斷檢查。2檢測用的、偵錯用的電腦Run the diagnostic software to find out why the laptop keeps freezing.執行檢測軟體，找出筆電一直當機的原因。3有特徵的、可資判別的正式A high fever with a rash is diagnostic of this infection.高燒合併起疹是這種感染的特徵。名詞1檢測程式、偵錯測試常用複數The mechanic ran diagnostics on the engine for twenty minutes.技師對引擎做了二十分鐘的檢測。2診斷法、診斷指標醫學This blood marker is a reliable diagnostic for the disease.這項血液指標是該疾病可靠的診斷依據。3診斷學常用複數Advances in diagnostics have made early detection much easier.診斷學的進展讓早期發現容易許多。