AskDefine | Define grains

User Contributed Dictionary



Spear sense from Old Norse grein meaning division. (Reference: Ray Parkin, H. M. Bark Endeavour, Miegunyah Press, second edition 2003, ISBN 0-522-85093-6, page 196.)


  1. Plural of grain
  2. An iron fish spear with a number of points half-barbed inwardly.
    1770: Served 5 lb of fish per man which was caught by striking with grains — journal of Stephen Forwood (gunner on H.M. Bark Endeavour), 4 May 1770, quoted by Parkin (page 195).

Extensive Definition

For grains in the sense of cereal crops, see cereal.


Grains is the giant structure of a metal is not usually the same all through the metal. if you look closely at a metal surface that has been spacially prepared, you can see that the metal is made up of a number of small crystals. These are called grains, and the places where they join are the grain boundaries.


A method of preparing preferred abrasive grain material is provided. The method involves steps of coating a non-sintered aluminum base particles with a metal alkoxide containing coating; heating to convert the coating to a metal oxide coating; and then sinter the base particles to provide sintered particles having an alpha-alumina-based core with an autogenously bonded metal oxide coating. The invention also concerns improved abrasive grain materials and abrasive products including the improved abrasive grain materials therein.
Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1