Noun grass snake has 3 senses
  1. grass snake, ring snake, ringed snake, Natrix natrix - harmless European snake with a bright yellow collar; common in England
    --1 is a kind of water snake
    --1 has particulars: viperine grass snake, Natrix maura
  2. garter snake, grass snake - any of numerous nonvenomous longitudinally-striped viviparous North American and Central American snakes
    --2 is a kind of colubrid snake, colubrid
    --2 is a member of Thamnophis, genus Thamnophis
    --2 has particulars:
     common garter snake, Thamnophis sirtalis; ribbon snake, Thamnophis sauritus; Western ribbon snake, Thamnophis proximus
  3. green snake, grass snake - either of two North American chiefly insectivorous green snakes
    --3 is a kind of colubrid snake, colubrid
    --3 is a member of Opheodrys, genus Opheodrys
    --3 has particulars:
     smooth green snake, Opheodrys vernalis; rough green snake, Opheodrys aestivus
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