Zeta definitions

zā'tə, zē'-
The sixth letter of the Greek alphabet.
noun
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The sixth letter of the Greek alphabet (Ζ, ζ)
noun
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A pricing model for derivatives that measures what effect volatility has on a portfolio. Derivatives are investments whose value is based on the performance of an underlying asset. Examples of derivatives are futures or options contracts.
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A medieval state roughly equivalent to modern Montenegro.
pronoun
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(physics) A torus-shaped reactor used in the mid-20th Century to carry out experiments in plasma physics and temperature controlled thermonuclear reactions.
noun
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Origin of zeta

Greek zēta of Phoenician origin ḏ in Semitic roots