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A/B testing

[ey-bee tes-ting] /ˈeɪˈbi ˌtɛs tɪŋ/
noun
1.
Digital Technology. a stage of design and development that compares two or more versions of a web page or app in simultaneous use to assess which is the optimized version for achieving a specified design goal or performance metric.
2.
a research methodology that compares two or more versions of a product or strategy to determine empirically which version is superior:
A/B testing informed our graphics choices for the new email marketing program.
Also called split testing.

A/B test

[ey-bee test] /ˈeɪˈbi ˌtɛst/
noun, Also called A/B experiment, split test
1.
Digital Technology. a comparison of two or more versions of a web page or app in simultaneous use to assess which is the optimized version for achieving a specified design goal or performance metric.
2.
an experiment that compares two or more versions of a product or strategy to determine empirically which version is superior:
The A/B test showed a more positive customer response to email marketing with short subject lines.
verb (used with object), Also, A/B-test [ey-bee-test] /ˈeɪˈbiˌtɛst/ (Show IPA), split-test [split-test] /ˈsplɪtˌtɛst/ (Show IPA)
3.
to subject (a website, app, product, or strategy) to a comparison of two or more versions in simultaneous use to assess which is the optimized version for achieving a specified design goal or performance metric.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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