plural of arc-boutant

(of a topological space) Such that every pair of points in the space comprises the boundary of some arc embedded in the space.

(metallurgy) The process of welding two pieces of metal together using the heat generated by an electric arc between two electrodes.

plural of second of arc

A discharge of electricity across a gap that causes ionization of the air (or other gas) resulting in a bright, hot plasma

(Australia, slang) To become upset or angry.

(astronomy) The arc of a circle described by the Sun, or a star, in the night.

An optical phenomenon, a large, brightly spectrum-coloured band running parallel to the horizon, formed by the refraction of sunlight or moonlight in plate-shaped ice crystals suspended in the atmosphere, typically in cirrus or cirrostratus clouds.

plural of minute of arc

(figuratively) A brave, visionary, or martial woman.