Keystone Noun Synonyms
necessity, crux, linchpin, basis, principle, foundation, cornerstone
Predestination was the keystone of his religion.
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Science / Marine Biology / Keystone Predator: The dominant predator or the top predator that has a major influence on community structure. For example, sea otters are a keystone predator in kelp beds. Sea otters eat urchins that feed on kelp whic MORE
Science / Marine Biology / Keystone Species: A predator at the top of a food web, or discrete subweb, capable of consuming organisms of more than one trophic level beneath it MORE
Entertainment / Baseball / Keystone Sack: Second base. MORE
Technology / Motorcycle / Keystone Frame: An American term to describe a diamond-type frame in which the engine serves as part of the structure. MORE