arc

arc, courbe

Forme ou trajet qui dessine une courbe.

En anglais simple : A curved shape or path.

• The ball flew in a high arc.
• She swung the rope in a wide arc overhead.
• Two graceful arcs of water crossed above the fountain.

Comment l'utiliser : in an arc (The ball flew through the air in an arc.)

Synonymes : curve

Expressions courantes : wide arc, in an arc

arc

Partie de la ligne qui forme un cercle ou d’une autre courbe.

En anglais simple : A section of the curved line around a circle or along another curve.

• Draw an arc on the paper.
• The arc covers ninety degrees of the circle.
• We measured the lengths of two arcs.

Comment l'utiliser : an arc of a circle (Draw an arc of a circle with a radius of five centimeters.)

Expressions courantes : arc of something, circular arc

arc électrique

Décharge électrique lumineuse qui traverse un espace entre deux points.

En anglais simple : A bright stream of electricity passing through a gap between two points.

• An electric arc flashed between the wires.
• The welding arc was too bright to look at.
• A damaged cable produced several dangerous arcs.

Synonymes : electric discharge

Expressions courantes : electric arc, welding arc

arc céleste

Trajectoire courbe que le soleil, la lune ou une étoile semble suivre dans le ciel.

En anglais simple : The curved path that the sun, moon, or a star seems to follow across the sky.

• The sun follows a low arc in winter.
• The astronomer calculated the arc of the star above the horizon.
• Long summer days give the sun a wider visible arc.

Expressions courantes : diurnal arc, nocturnal arc

décrire un arc

Se déplacer en suivant une trajectoire courbe.

En anglais simple : To move along a curved path.

• The ball arced through the air.
• Water arced over the flowers.
• A shooting star was arcing across the dark sky.

Comment l'utiliser : arc over something (The ball arced over the goalkeeper.); arc across something (A jet of water arced across the garden.)

Synonymes : curve

Expressions courantes : arc across something, arc through something, arc over something

produire un arc électrique

Pour l’électricité, traverser un espace en formant une décharge lumineuse.

En anglais simple : When electricity does this, it passes through a gap as a bright stream.

• The damaged wire began to arc.
• Electricity arced across the small gap.
• Current was arcing between the metal contacts.

Comment l'utiliser : arc between A and B (Electricity arced between the two exposed wires.); arc across something (The current arced across the gap.)

Synonymes : spark

Expressions courantes : arc across something, arc between something