simple eye simple eye /ˈsɪmpl aɪ/

noun

1. An eye having a single lens  ( ocellus , simple eye , stemma )
   an eye having a single lens
   
   

 white ant white ant /waɪt ænt/

noun

1. Whitish soft-bodied ant-like social insect that feeds on wood  ( termite , white ant )
   whitish soft-bodied ant-like social insect that feeds on wood
    The termite ate away at the wood, slowly but surely destroying the structure
   The termite ate away at the wood, slowly but surely destroying the structure
   
   

 Notonecta undulata Notonecta undulata /ˌnoʊtoʊˈnɛktə ˌʌndʒʊˈleɪtə/

noun

1. Predaceous aquatic insect that swims on its back and may inflict painful bites  ( backswimmer , Notonecta undulata )
   predaceous aquatic insect that swims on its back and may inflict painful bites
   
   

 DOS DOS /ˈdoʊs/

noun

1. An operating system that is on a disk  ( disk operating system , DOS )
   an operating system that is on a disk
   

 DoS

1. The federal department in the United States that sets and maintains foreign policies  ( DoS , State , United States Department of State , Department of State , State Department )
   the federal department in the United States that sets and maintains foreign policies
    The Department of State was created in 1789
   the Department of State was created in 1789