colossal squid(redirected from Mesonychoteuthis)
A very large squid (Mesonychoteuthis hamiltoni) having a large head and mantle and hooks on its arms and tentacles. Colossal squids inhabit Antarctic waters and can reach weights of approximately 500 kilograms (1,100 pounds).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.