Glossary

A2, A4, A5, etc.

System of standardizing paper sizes that is commonly used in most countries apart from Canada and the United States. It begins with A0, which measures 841 × 1189 mm; for each subsequent size the longer measurement is halved so A1 measures 594 × 841 mm. This continues to A10 which measures 26 × 37 mm. The US system is more complicated with paper measured in inches and the standard letter size, equivalent to A4, is 81⁄2 × 11 in (216 × 279 mm). They have many other sizes in common use including Legal (216 × 356 mm), Executive (190 × 254 mm), and Ledger/Tabloid (279 × 432 mm).

Bas-relief

Picture, often formed from clay, in which elements are carved or sculpted on a background which is less than half of its full depth, i.e. ...

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