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Definitions

assay

[a-sey, as-ey, a-sey] / æˈseɪ, ˈæs eɪ, æˈseɪ /
NOUN
analysis
Synonyms
STRONG
appraisal assessment estimation evaluation examination inspection investigation measurement rating survey test trial valuation
Antonyms
STRONG
ignorance neglect
VERB
analyze
Synonyms
STRONG
appraise apprise assess check estimate evaluate examine eyeball inspect investigate measure peg prove rate read see size survey test try valuate value weigh
WEAK
check out size up
Antonyms
STRONG
ignore neglect

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Dash, whose team includes former software engineers from Moderna, automates common laboratory tests such as Elisa, or enzyme-linked immunosorbent assay, which is used for tasks such as evaluating a drug’s safety and efficacy.

From The Wall Street Journal • Jul. 23, 2025

We set up an inhibition assay in test tubes.

From Salon • Dec. 16, 2024

The new assay aligns with ongoing efforts by state and federal agencies, which have invested more than $10 million from 2004 to 2021 to manage the Burmese pythons alone.

From Science Daily • Nov. 22, 2024

And they used a common free-radical-scavenging assay to measure and compare the antioxidant activity of the bioactive compounds in the juice and wines.

From Science Daily • May 15, 2024

By the mast pond, where the great spars of ships lay refracted, we saw a little girl with a bucket, a vain and minute assay at extinguishing the flames.

From "The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume II: The Kingdom on the Waves" by M.T. Anderson