WordNet (r) 3.0 (2006):

Helvetica
    n 1: a typeface in which characters have no serifs [syn: sans
         serif, Helvetica]

The Free On-line Dictionary of Computing (30 December 2018):

Helvetica

    One of the most widely used sans-serif typefaces,
   developed in 1957 by Swiss typeface designer Max Miedinger with
   Eduard Hoffmann.  Originally called Neue Haas Grotesk, it was
   renamed Helvetica for the international market.  Helvetica is very
   similar to the common Arial typeface.  The name is Latin for
   Swiss.

   Linotype (http://www.linotype.com/526/helvetica-family.html).

   (2013-09-19)