discoloration

/dis'kʌləmənt/ Cách viết khác : (discolourment) /dis'kʌləmənt/ (discoloration) /dis,kʌl

Thân thiện

The old book had a noticeable discoloration on its cover.

Definition

1. Noun:
   • The process or result of losing or changing color: "Discoloration" refers to the act of becoming a different, usually less attractive, color, or the mark or area that results from this change. It often implies fading, staining, or an unnatural alteration from the original hue.
   • A stained or faded spot or area: It can also denote a specific area where the color has been changed, often due to damage, age, or exposure to elements.

Usage and Examples

• As a noun (process):

  • The discoloration of the old photograph was caused by sunlight. (The change in the photo's color resulted from exposure to light.)
  • Chemical exposure can lead to the discoloration of metals. (Chemicals can cause metals to change color.)

• As a noun (result/spot):

  • There was a yellowish discoloration on the ceiling from a water leak. (A yellow stain marked the ceiling where water had damaged it.)
  • The dentist pointed out a small discoloration on the tooth. (The dentist identified a spot where the tooth's color was abnormal.)

Advanced Usage

• Technical/Scientific Context: In medicine, "discoloration" often describes abnormal skin patches, such as bruising (ecchymosis) or liver spots. In materials science, it refers to color changes in plastics, fabrics, or metals due to UV degradation or chemical reactions.
  • The patient presented with skin discoloration around the wound site.
  • UV radiation is a primary cause of polymer discoloration.

Variants and Related Words

• Discolouration: An alternative British English spelling of "discoloration." The meaning is identical.
• Discolor (verb): To change or lose color; to stain.
  • The strong cleaner might discolor the fabric.
• Discolored (adjective): Having lost or changed color.
  • He replaced the discolored tiles in the bathroom.

Synonyms

• Stain: A colored patch or dirty mark that is difficult to remove.
• Fading: The process of losing brightness or color.
• Tarnishing: Loss of luster or discoloration, especially on metal.
• Blemish: A small mark or flaw that spoils the appearance.

Antonyms

• Coloration: The process or result of applying color.
• Brightening: Making something brighter or more vivid in color.

Related Phrases and Idioms

(Note: "Discoloration" itself is not commonly used in idiomatic phrases. The related verb "discolor" is used in practical warnings or descriptions.) - To resist discoloration: A property of a material that does not fade or stain easily. - This fabric is treated to resist discoloration from sunlight. - Permanent discoloration: A color change that cannot be reversed. - The spill caused permanent discoloration of the marble countertop.

Học thuật

Noun

1. the act of changing the natural color of something by making it duller or dingier or unnatural or faded
2. a soiled or discolored appearance
   • the wine left a dark stain

Từ đồng nghĩa

• discolouration
• stain