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Definition of tidemark

tidemark

/ˈtaɪd.mɑːrk/
tide · mark
Plural:tidemarks
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tidemark Lexical Profile

tidemark Game Scores & Validity

• noun

1

A line or mark left on a shore, rock, or seawall indicating the highest or lowest point reached by the tide.

Example

"Bands of dried seaweed and driftwood formed a distinct tidemark along the sandy beach."

2

British A dirty ring left around the inside of a bathtub after the water has been drained, or a visible line on a person's skin showing where washing stopped.

Example

"He scrubbed the porcelain tub to remove the soapy tidemark before the guests arrived."

3

In anatomy and histology, the distinct calcified boundary line separating uncalcified articular cartilage from deeper calcified cartilage in a joint.

Example

"Microscopic examination of the osteoarthritic joint revealed duplication of the tidemark within the articular cartilage."

Synonyms
View all synonyms for tidemark

• Nearby Words

tide
tideless
tideline
tidemark
tidewater
tidily
tidiness

Cite this Entry

Wordmom. (2026). Definition of Tidemark. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/tidemark
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