Webster's English Dictionary

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ostrich

os.trich \'a:s-trich, 'o.s- also -trij\ n [ME, fr. OF ostrusce, fr. 
   (assumed) VL avis struthio, fr. L avis] bird + LL struthio ostrich - more 
   at STRUTHIOUS 1a: a swift-footed two-toed flightless ratite bird (genus 
   Struthio, e sp. S. camelus of northern Africa) with valuable wing and tail 
   plumes that is largest of existing birds and often weighs 300 pounds 1b: 
   RHEA  2: one who attempts to avoid danger by refusing to face it