blue oak

noun

Definition of blue oak

:an oak of the genus Quercus (Q. douglasii) that occurs on sunny dry foothills and slopes up to about 3000 feet in the California coastal range, has smooth whitish bark, usually ovoid acorns maturing in one year, and stiff bluish-green deciduous leaves usually with irregular lobes, and grows to a height of 50 to 75 feet

There's more!

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!
Already a subscriber? Log in.

Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

all at once

Get Word of the Day daily email!

Love words? Need even more definitions?

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