boron

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a trivalent metalloid element;
occurs both in a hard black crystal and in the form of a yellow or brown powder
• Syn:
B, atomic number 5
• Derivationally related forms:
boronic, boric
• Hypernyms:
chemical element, element
• Substance Holonyms:
kernite, borax

• Từ đồng nghĩa / Synonyms:
  B, atomic number 5