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addaword.gifdefinition of adamantine

used about a person who is very hard, unbreakable or unyielding
A person can reach great heights, given his adamantine nature.
Submitted by: Mohua from India on 25/02/2012 06:19:00
Definition of adamantine from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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bottom gear

the gear that you use for driving a vehicle very slowly