Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A measure of the cloudiness or turbidity of surface water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A measure of the turbidity of a body of water; the depth at which a Secchi disk is no longer visible.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After the Secchi disk.]

Examples

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