丘脑底部：插于背侧丘脑、丘脑下部和中脑被盖之间的间脑移行区，包括丘脑下部核、Forel区(Forels fields)和未定带(zona incerta)- Sydenham's chorea,cough
- syllabize
- syllabus
- syllepsiology
- syllepsis
- sylvan
- sylvatic
- Sylvest's disease
- sylvian
- symballophone
- symbiology
- symbion
- symbionic
- symbiont
- symbiosis
- symbiote
- pseudosclerema
- pseudosclerosis
- pseudoscrotum
- pseudosmia
- pseudosolution
- pseudostoma
- pseudostrabismus
- pseudostrophanthin
- pseudostructure