A
Seed from Open English WordNet (OEWN) 2025
Meanings by context
-
- definition a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
- definition any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
- definition nucleotide derived from adenine with a deoxyribose sugar and a phosphate group
- definition (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
- definition the basic unit of electric current adopted under the Systeme International d'Unites
- definition the 1st letter of the Roman alphabet
- definition the blood group whose red cells carry the A antigen