To save this word, you'll need to log in.
Lach·e·sis | \ ˈlak-ə-səs 
\
\Medical Definition of Lachesis
: a genus of American pit vipers comprising the bushmaster and related snakes that are sometimes included in the genus Trimeresurus
Comments on Lachesis
What made you want to look up Lachesis? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
More Confusing Words—Quiz
- The magician
______moved the selected card to the top of the deck.
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- More Confusing Words—Quiz
How many of these commonly confused words do you know?
Take the quiz - Name that Thing: Toys and Games Edition
It's all fun and games until someone beats your high score.
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Dictionary Devil
The dictionary has been scrambled—can you put it back together?
Play the game
Share Lachesis