turmeric-paper
Definition
Noun: - Chemistry: "turmeric-paper" refers to a type of paper that has been treated or impregnated with turmeric extract. It is used as a chemical indicator, typically turning from yellow to reddish-brown in alkaline conditions.
Usage Examples
- (The paper changed colour to indicate a basic substance.)
- (It is a basic indicator paper.)
Advanced Usage
- "Turmeric-paper test": a qualitative chemical test where the paper is dipped into a solution; a colour change to red or brown signifies the presence of an alkali.
- The turmeric-paper test confirmed that the sample was alkaline. (The indicator paper reacted as expected.)
Variants and Related Words
Turmeric (n): a yellow spice derived from the root of Curcuma longa, used in cooking and as a dye.
- The yellow colour of turmeric is due to curcumin. (The spice contains a natural pigment.)
Indicator paper (n): any paper treated with a chemical to show pH or other properties by colour change.
- Litmus paper is a common indicator paper, similar to turmeric-paper. (Both are used for chemical testing.)
Synonyms
- Curcuma paper: a less common term for the same substance.
- Alkali indicator paper: a general term for paper that detects bases.
Related Idioms
- None: "turmeric-paper" is a technical term with no idiomatic usage.
Phrasal Verbs
- None: "turmeric-paper" is a noun compound and does not form phrasal verbs.