A laboratory test for a particular substance.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

As*say" (#), n. [OF. asai, essai, trial, F. essa. See Essay, n.]

1.

Trial; attempt; essay.

[Obs.]

Chaucer.

I am withal persuaded that it may prove much more easy in the assay than it now seems at distance. Milton.

2.

Examination and determination; test; as, an assay of bread or wine.

[Obs.]

This can not be, by no assay of reason. Shak.

3.

Trial by danger or by affliction; adventure; risk; hardship; state of being tried.

[Obs.]

Through many hard assays which did betide. Spenser.

4.

Tested purity or value.

[Obs.]

With gold and pearl of rich assay. Spenser.

5. Metallurgy

The act or process of ascertaining the proportion of a particular metal in an ore or alloy; especially, the determination of the proportion of gold or silver in bullion or coin.

6.

The alloy or metal to be assayed.

Ure.

Assay and essay are radically the same word; but modern usage has appropriated assay chiefly to experiments in metallurgy, and essay to intellectual and bodily efforts. See Essay.]

Assay is used adjectively or as the first part of a compound; as, assay balance, assay furnace.

Assay master, an officer who assays or tests gold or silver coin or bullion. -- Assay ton, a weight of 29.166�xa6; grams.

 

© Webster 1913.


As*say", v. t. [imp. & p. p. Assayed (#); p. pr. & vb. n. Assaying.] [OF. asaier, essaier, F. essayer, fr. essai. See Assay, n., Essay, v.]

1.

To try; to attempt; to apply.

[Obs. or Archaic]

To-night let us assay our plot. Shak.

Soft words to his fierce passion she assayed. Milton.

2.

To affect.

[Obs.]

When the heart is ill assayed. Spenser.

3.

To try tasting, as food or drink.

[Obs.]

4.

To subject, as an ore, alloy, or other metallic compound, to chemical or metallurgical examination, in order to determine the amount of a particular metal contained in it, or to ascertain its composition.

 

© Webster 1913.


As*say", v. i.

To attempt, try, or endeavor.

[Archaic. In this sense essay is now commonly used.]

She thrice assayed to speak. Dryden.

 

© Webster 1913.

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