- A fold with strata sloping downward on both sides from a common crest.背斜：地层从山峰两侧向下倾斜所形成的褶皱
- semipalmated
- semipalmated plover
- semiparasite
- semipermeable
- semipolitical
- semiporcelain
- semiprecious stone
- semiprivate
- semipro
- semipro
- semiprofessional
- semipublic
- semiquaver
- semiquavers
- semiretired
- semirigid
- semiround
- semirural
- semis
- semiskilled
- semisoft
- semisolid
- semispherical
- semistaged
- semisterile