名詞 cusp:

1. point formed by two intersecting arcs (as from the intrados of a Gothic arch)
2. a thin triangular flap of a heart valve
   同義詞：leaflet
3. small elevation on the grinding surface of a tooth

cusp

n.（名詞）
A point or pointed end.
頂點(diǎn)，尖端
Anatomy
【解剖學(xué)】
A pointed or rounded projection on the chewing surface of a tooth.
牙尖：牙齒咬合面上的尖狀或圓形凸起
A triangular fold or flap of a heart valve.
尖瓣：心臟瓣膜的褶皺或瓣片之一
Mathematics A point at which a curve crosses itself and at which the two tangents to the curve coincide.
【數(shù)學(xué)】 尖點(diǎn)，會(huì)切點(diǎn)：曲線上的一個(gè)點(diǎn)，曲線在該點(diǎn)與其本身相交，曲線的兩條切線在該點(diǎn)重合
Architecture The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil.
【建筑學(xué)】 尖頂：兩條裝飾性弧線或曲線的交叉點(diǎn)，如三葉飾的內(nèi)尖頂
Astronomy Either point of a crescent moon.
【天文學(xué)】 月角：新月的任一月尖
A transitional point or time, as between two astrological signs.
過渡：過渡點(diǎn)或過渡時(shí)間，尤指占星術(shù)的兩個(gè)天宮之間的

來源：
Latin cuspis [point]
拉丁語 cuspis [尖端]