-ium

短语

suf. [构成名词]表示：[化学]化学元素：sodium; [化学]阳离子：ammonium, carbonium; [生物学]身体部位, 生物构造：mycelium; [植物学]块,小块：pollinium

发音

US

词形变化

-iums 复数 -ia 复数

释义与例句

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  1. 1.

    Used to form the names of metal elements, after the style of early-named elements, as well as the isotopes of hydrogen.

    不可数 化学
  2. 2.

    Used to form the temporary systematic element name of a metallic or nonmetallic element which is postulated to exist, or which has been newly synthesized and has not yet been assigned a permanent name.

    不可数 化学
  3. 3.

    Used to form the name of polyatomic cations. Common examples are quaternary ammonium compounds used as neuromuscular blocking agents, cholinergic agents, anticholinergic agents, antibacterials/antiseptics, or other agents.

    不可数 化学

    Alternative form: -onium

  4. 4.

    Appended to common words to create scientific-sounding or humorous-sounding fictional substance names.

    幽默 不可数 引申义
  5. 1.

    Used to form the name of an aggregation or mass of something, such as biological tissue

    epithelium, pollinium

  6. 2.

    Forms the name of biological structures and parts.

    clinanthium, periodontium

  7. 1.

    Used to indicate the setting where a given activity is carried out

    auditorium, gymnasium, planetarium

词源

From Latin -um (neuter singular morphological suffix), based on Latin terms for metals such as ferrum (“iron”).

来源：wiktionary