Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

microsphere

play
noun mi·cro·sphere \ˈmī-krə-ˌsfir\

Definition of microsphere

  1. :  a minute sphere

mi·cro·spher·i·cal play \ˌmī-krə-ˈsfir-i-kəl, -ˈsfer-\ adjective


1894

First Known Use of microsphere

1894


Medical Dictionary

microsphere

play
noun mi·cro·sphere \-ˌsfir\

Medical Definition of microsphere

  1. :  a spherical shell that is usually made of a biodegradable or resorbable plastic polymer, that has a very small diameter usually in the micron or nanometer range, and that is often filled with a substance (as a drug or antibody) for release as the shell is degraded




Learn More about microsphere


Seen and Heard

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

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders duvet spindrift pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ