noun, plural self-di·ag·no·ses [self-dahy-uh g-noh-seez] /ˈsɛlfˌdaɪ əgˈnoʊ siz/.
- the diagnosis of one’s own malady or illness.
- the capability of an electronic system to detect and analyze an error or malfunction within itself.
n.
- Diagnosis of one’s own illness or disease without professional medical consultation.