(trigonometry) Any of several single-valued or multivalued functions that are inverses of the tangent function. Symbol: arctan, tan⁻¹

Abbreviation of arctangent.

(trigonometry) Alternative form of artanh (“the inverse hyberbolic tangent function”)

plural of arctangent

plural of arctation

(medicine) Constriction or contraction of a natural passage, as in constipation from inflammation.

(trigonometry) Relating to the arctangent.

plural of arctan

(obsolete) Of or relating to the Arctalia.

(dated) Nearctic