- 1凸性；凸面（向外凸出）
When something is convex, it curves out towards you — like the outside of a ball, or the front of your eye. Convexity is that outward curve, or the fact of having it. You meet the word most in maths, science, and design: a convex lens is thicker in the middle and can bring light together; a convex mirror bulges out and makes things look smaller. The everyday opposite is a hollow, bowl-like curve. Though actually, specialists also stretch convexity onto graphs and even onto money maths, where it names how a line or a price bends — still the same “curves out” picture, just drawn on paper. For most , the physical shape is the meaning that matters, and it is a calm, technical word, not an everyday one.
組成convex (curved outwards) + -ity (Latin -itās through French -ite: turns an adjective into a noun meaning “the quality of being that way”).
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
convexitynoun
- 1
The state of being convex.
- 2
A convex line or surface.
- 3
businessfinanceA measure of the curvature in the relationship between the prices and yields of bonds.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。