Definition

Noun: 1. A type of synthetic red dye: "Alizarin red" refers to any of a group of acid dyes derived from alizarin, used primarily to color wool and other textiles a scarlet or red hue. It is a specific chemical compound used in industrial and laboratory contexts.

Usage

• As a direct object: The term is used to name the specific dye substance.
  • The fabric was treated with alizarin red to achieve a vibrant color.
  • The protocol calls for staining the sample with alizarin red.
• As a compound modifier: It is often used adjectivally to describe other nouns related to its application.
  • We need to prepare an alizarin red solution for the experiment.
  • The alizarin red staining technique is common in histology.

Advanced Usage

• In scientific contexts: "Alizarin red" is frequently used in biological and histological staining, particularly to detect calcium deposits (e.g., in bone or cartilage studies).
  • The alizarin red stain clearly marked the mineralized nodules in the cell culture.

Variants and Related Words

• Alizarin (noun): The parent organic compound from which alizarin red and other dyes are derived. It was originally obtained from the madder plant.
• Alizarin Crimson (noun): A specific, permanent pigment used by artists, closely related to alizarin red dyes.

Synonyms

• Madder lake: A historical pigment made from the madder plant, related to synthetic alizarin dyes.
• Turkey red: A similar, historically important dye and color.

Notes on Meaning

The term "alizarin red" specifically denotes the synthetic acid dye used for coloring. It should not be confused with the broader artistic pigment "alizarin crimson," though they share a chemical origin. Its primary modern use is in scientific staining rather than textile dyeing.

Noun

1. any of various acid dyes; used for dyeing wool scarlet red