from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A market condition in which purchasers are so few that the actions of any one of them can materially affect price and the costs that competitors must pay.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An economic condition in which a small number of buyers exert control over the market price of a commodity.
olig(o)- + (mon)opsony.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ὀλίγοι (oligoi, "few") + ὀψωνία (opsōnia, "purchase"), corresponding to oligo- + -opsony. (Wiktionary)