angle bracket

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Either of a pair of symbols, < >, used to enclose written or printed material.
2. n. Mathematics Either of these symbols, used especially together to indicate quantities to be treated as a unit.

Wiktionary

1. n. computing Either of the two inequality signs of ASCII, < and >, when used as brackets in markup languages like HTML.
2. n. typography, mathematics Either of a pair of symbols, ⟨ and ⟩, used to enclose text in various technical contexts, and in mathematical formulas to denote an interval or a continuous parameter.

WordNet 3.0

1. n. either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material
2. n. an L-shaped metal bracket