written communication, written language - communication by means of written symbols

letter, missive - a written message addressed to a person or organization; "mailed an indignant letter to the editor"

card - a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures); "they sent us a card from Miami"

compatibility - capability of existing or performing in harmonious or congenial combination

conformance, conformity - correspondence in form or appearance

proportion, proportionality - the quotient obtained when the magnitude of a part is divided by the magnitude of the whole

function, mathematical function - a mathematical relation such that each element of one set is associated with at least one element of another set

isometry - a one-to-one mapping of one metric space into another metric space that preserves the distances between each pair of points; "the isometries of the cube"

1st class, 1st-class mail, first-class mail, priority mail, first class - mail that includes letters and postcards and packages sealed against inspection

spatial property, spatiality - any property relating to or occupying space

geometrical regularity, regularity - a property of polygons: the property of having equal sides and equal angles

bilateral symmetry, bilateralism, bilaterality - the property of being symmetrical about a vertical plane

radial symmetry - the property of symmetry about an axis; "the starfish illustrates radial symmetry"

math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

similarity - the quality of being similar