A table is referred to in set theory terminology as a relation, from which the expression relational database is derived.
Every relational table consists of one row of column headings (more commonly called column names) and zero or more unique rows of data values.
Formally speaking, each row represents what set theory calls a tuple. Each column represents what set theory calls an attribute.
The number of rows (or tuples) in a table is called its cardinality and the number of columns (or attributes) is called its degree or arity.