le demi-cercle

Demi-cercle is a French noun made up of two parts:

• demi meaning "half"
• cercle meaning "circle"

Meaning:

A demi-cercle is a half-circle in English. It refers to a geometric shape that represents half of a full circle, typically formed by dividing a circle along its diameter. This shape looks like a curved arc bounded by a straight line segment (the diameter).

Usage:

• It is often used in geometry, design, and architecture.
• For example, the shape of a fan or a semi-circular arch can be described as a "demi-cercle."

Synonyms:

• Half-circle (English equivalent)
• Arc (although slightly different, sometimes used loosely)

Antonyms:

• Cercle (Circle)
• Plein cercle (Full circle)

In summary, demi-cercle straightforwardly means "half of a circle" and is commonly used to describe that shape or form in various contexts.