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The Collaborative International Dictionary
Shieldtail

Shieldtail \Shield"tail`\, n. (Zo["o]l.) Any species of small burrowing snakes of the family Uropeltid[ae], native of Ceylon and Southern Asia. They have a small mouth which can not be dilated.

Wiktionary
shieldtail

n. Any species of small burrowing snakes of the family ''(taxlink Uropeltidae family noshow=1)'', native to Ceylon and Southern Asia.