形容詞 diagnostic:

1. concerned with diagnosis; used for furthering diagnosis
2. characteristic or indicative of e.g. a disease
   同義詞：symptomatic

1. Strip to the waist and lie down on the diagnostic couch over there.
   把衣服解開到腰間，躺到那診斷床上去。
2. The removal and examination of a sample of tissue from a living body for diagnostic purposes.
   活組織檢查因診斷目的而從生命體中取出、消除和觀察樣品組織
3. Diagnostic imaging in which ultrasound is used to visualize an internal body structure or a developing fetus.
   超聲波掃描術利用超聲波來顯示耳體結(jié)構(gòu)或胚胎發(fā)育情況的診斷用的成像法

di.ag.nos.tic

adj.（形容詞）
Of, relating to, or used in a diagnosis.
診斷的：診斷的，與診斷有關的，或在診斷中使用的
Serving to identify a particular disease; characteristic.
特征的：鑒別出某種特別的病癥；特性的
n.（名詞）
Often diagnostics (used with a sing. verb)The art or practice of medical diagnosis.
常作 diagnostics （與單數(shù)動詞連用）診斷：醫(yī)學診斷行為或?qū)嵺`
A symptom or a distinguishing feature serving as supporting evidence in a diagnosis.
癥狀：用于做出診斷的癥狀或特別的表現(xiàn)
An instrument or a technique used in medical diagnosis.
診器：用于醫(yī)學的儀器或技術

來源：
Greek diagnôstikos [able to distinguish]
希臘語 diagnôstikos [可以辨別的]
from diagnôstos [distinguished]
源自 diagnôstos [區(qū)別]
from diagignôskein [to distinguish] * see diagnosis
源自 diagignôskein [辨別] *參見 diagnosis

【引伸】
di.agnos.tically
adv.（副詞）