variants: or sidero-

Definition of sider- 

(Entry 1 of 2)

: iron hemosiderin siderolite

-sid·​er | \ˈsīd-ər\

Definition of -sider (Entry 2 of 2)

: one placed or living in a usually specified side (such as a section of the city) an east-sider

History and Etymology for sider-

Combining form (1)

Greek sidēr-, sidēro-, from sidēros

Keep scrolling for more

Learn More about sider-

Statistics for sider-

Look-up Popularity

Comments on sider-

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

WORD OF THE DAY

having a pattern of small flowers

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Spell It

Can you spell these 10 commonly misspelled words?

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!