The seed of flax, especially when used as the source of linseed oil; flaxseed.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "linseed" in a sentence
"It is about thirty years since miners in this district adopted the use of coarse linseed oil, instead of whale oil, to burn in their lamps; and it is very generally known, that the smoke from the former is immensely greater than that from the latter, and many old miners date the greater prevalence of black spit to the introduction of the _linseed_ oil."
"She went out to put her brush in linseed oil, then came back to sit with Gillam."
"Flax oil also known as linseed oil, and valued in manufacturing for drying to a tough water-resistant layer is by far the richest source of omega-3 fatty acids among plant foods."