tactoid

noun
tac·​toid | \ ˈtak-ˌtȯid How to pronounce tactoid (audio) \

Medical Definition of tactoid

: an elongated particle (as in a sickle cell, myosin, or fibrin) that appears as a spindle-shaped body under a polarizing microscope

Comments on tactoid

What made you want to look up tactoid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a sum of money that is sent as a payment

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time traveler quiz which word came first
  • Which came first?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!