Any of several shades of a deep, bright orange colour, often used (especially in engineering and the aerospace industry) to make objects clearly visible from a distance.
Origin
1920s; earliest use found in Pulp & Paper Magazine.
Definition of international orange in US English:
international orange
noun
Any of several shades of a deep, bright orange colour, often used (especially in engineering and the aerospace industry) to make objects clearly visible from a distance.
Origin
1920s; earliest use found in Pulp & Paper Magazine.