It's a Latin adjective meaning "Swiss"
[DOC] [TLE] Ostensible | Definition of Ostensible by Merriam-Webster [PAR] Define ostensible: seeming or said to be true or real but very possibly not true or 
real ... at once to admire its delicately judged textures and Swiss-watch precision 
 ... "Ostensible," which descends from the Latin word ostendere ("to show"),... [DOC] [TLE] Bigelow & Holmes: Apple Typeface Designs [PAR] Meier's concept of a humanist Sans-serif and its realization in Syntax is ..... 
Helvetica is an adjective meaning Swiss, derived from the old Latin name for an
... [DOC] [TLE] Two English apr-words, part 2: 'Apricot' | OUPblog [PAR] Aug 8, 2012 ...