Meaning : A metric unit of length equal to one ten billionth of a meter (or 0.0001 micron). Used to specify wavelengths of electromagnetic radiation.
Synonyms : angstrom, angstrom unit
Meaning : Any of several fat-soluble vitamins essential for normal vision. Prevents night blindness or inflammation or dryness of the eyes.
Synonyms : antiophthalmic factor, axerophthol, vitamin a
Meaning : One of the four nucleotides used in building DNA. All four nucleotides have a common phosphate group and a sugar (ribose).
Synonyms : deoxyadenosine monophosphate
Meaning : (biochemistry) purine base found in DNA and RNA. Pairs with thymine in DNA and with uracil in RNA.
Synonyms : adenine
Meaning : The 1st letter of the Roman alphabet.