English Dictionary

SAD

noun

(medicine) Initialism of seasonal affective disorder. / Initialism of standard American diet. / (US) Initialism of Special Activities Division. / (psychology) Initialism of social anxiety disorder.

She couldn't hide her sadness.

意味（1）

(medicine) Initialism of seasonal affective disorder.

意味（2）

Initialism of standard American diet.

意味（3）

(US) Initialism of Special Activities Division.

意味（4）

(psychology) Initialism of social anxiety disorder.

意味（5）

(X-ray crystallography) Initialism of single-wavelength anomalous dispersion.