selenium

/si'li:njəm/
Học thuật
Thân thiện
selenium

A scientist carefully handles a sample of selenium in the laboratory.

Definition
  1. Noun:
    • A chemical element: Selenium is a nonmetallic chemical element with the symbol Se and atomic number 34. It is chemically related to sulfur and tellurium.
    • Properties and occurrence: It is a trace element that exists in several allotropic forms. A stable, gray, metallike form exhibits increased electrical conductivity when exposed to light. It is found in sulfide ores like pyrite.
Usage
  • Selenium is primarily discussed in scientific, industrial, and nutritional contexts.
  • It is used as a noun, typically preceded by articles like "the" or "some," or used in compound terms.
Examples
  • Noun:
    • Selenium is an essential micronutrient for many organisms.
    • The photocell's operation relies on the photoconductive properties of selenium.
    • High concentrations of selenium in soil can be toxic to plants.
Advanced Usage
  • "Selenium deficiency": A lack of adequate selenium in the diet, which can lead to health problems.
    • Selenium deficiency is linked to certain heart and muscle disorders.
  • "Selenium rectifier": An early type of semiconductor device that uses selenium.
    • Old radio equipment often contained selenium rectifiers.
Variants and Related Words
  • Selenide (n): A compound containing selenium with a more electropositive element.
    • Hydrogen selenide is a toxic gas.
  • Selenate (n): A salt or ester of selenic acid.
  • Selenious (adj): Relating to or containing selenium, especially in a lower valence state.
Synonyms
  • Element 34: Referring to its atomic number.
  • Trace element: In nutritional contexts, emphasizing its required small amounts.
Related Phrases
  • Selenium web driver: A tool for automating web browsers for testing purposes (a specialized software usage named after the element).
    • The QA engineer wrote tests using Selenium WebDriver.
selenium

A scientist carefully handles a sample of selenium in the laboratory.

Noun
  1. a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)

Từ đồng nghĩa

Từ gần giống

Từ chứa "selenium"

Từ có nhắc đến "selenium"