11 letters · 20 points in Scrabble
noun (classical mythology) a serpent with a head at each end of its body
noun type genus of the Amphisbaenidae
originFrom Latin amphisbaena, from Ancient Greek ἀμφίσβαινα (amphísbaina, from ἀμφίς (amphís, “both ways”) + βαίνω (baínō, “to go”)).
Etymology from Wiktionary, CC BY-SA 3.0