different between differentiation vs variance

English

Etymology

From differentiate +? -ion, from different +? -iate, from differ +? -ent, from Middle English differen, from Old French differer, from Latin differ? (“carry apart, put off, defer; differ”), from dis- (“apart”) + fer? (“carry, bear”); cognate with Ancient Greek ??????? (diaphér?, “to differ”).

Pronunciation

• Rhymes: -e???n

Noun

differentiation (countable and uncountable, plural differentiations)

1. The act of differentiating.
2. The act of distinguishing or describing a thing, by giving its different, or specific difference; exact definition or determination.
3. The gradual formation or production of organs or parts by a process of evolution or development, as when the seed develops the root and the stem, the initial stem develops the leaf, branches, and flower buds; or in animal life, when the germ evolves the digestive and other organs and members, or when the animals as they advance in organization acquire special organs for specific purposes.
4. (geology) The process of separation of cooling magma into various rock types.
5. (calculus) The process of determining the derived function of a function.

Derived terms

• cellular differentiation
• evolutionary differentiation
• planetary differentiation

Related terms

• differ
• difference
• different
• differentiate
• differential

Translations

See also

• differentiation on Wikipedia.Wikipedia

English

Alternative forms

• variaunce (obsolete)
• var (abbreviation)

Etymology

From Middle English variance, variaunce, from Old French variance or directly from Anglo-Latin variaunce, veriaunce, wariaunce; all from Latin variantia.

Pronunciation

• (UK) IPA^(key): /?v???i.?ns/
• (US) IPA^(key): /?væ?i.?nts/ (Mary–marry–merry distinction)
• (US) IPA^(key): /?v??i.?nts/ (Mary–marry–merry merger)

Noun

variance (countable and uncountable, plural variances)

1. The act of varying or the state of being variable.
2. A difference between what is expected and what is observed; deviation.
3. The state of differing or being in conflict.
4. An official permit to do something that is ordinarily forbidden by regulations.
5. (law) A discrepancy between two legal documents.
6. (law) A departure from a cause of action originally in a complaint.
8. (statistics) The second central moment in probability.
9. (physics, chemistry, biology) The number of degrees of freedom in a system.
10. (computing, programming) Covariance and contravariance generally.

    Depending on the variance of the type constructor, the subtyping relation of the simple types may be either preserved, reversed, or ignored for the respective complex types.

Derived terms

Translations

French

Etymology

From Latin variantia.

Pronunciation

• IPA^(key): /va.?j??s/
• Rhymes: -??s

Noun

variance f (plural variances)

1. variance

Further reading

• “variance” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).