litmus paper

NOUN

acid-base indicator

Synonyms

WEAK

indicator reagent testing agent

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.

Leyla, one student who sat the maths paper on Wednesday, says no revision could have prepared her for the exam.

From BBC • Jun. 5, 2026

England's exam regulator Ofqual says it is "closely monitoring" the marking of an A-level maths paper which students and parents say felt "unfair".

From BBC • Jun. 5, 2026

One AS level maths paper will use assessed marks, and a second will have a replacement exam in early June.

From BBC • May 26, 2026

As a result, more than 167,000 students in England received grade 3 or lower on their maths paper this summer - about 21,000 more than in 2022.

From BBC • Oct. 24, 2023

Leonardo is already revising to sit the higher maths paper this summer.

From BBC • Jan. 14, 2022