noun
a very poisonous metallic element that has three allotropic forms
Synonyms
Examples
- arsenic and arsenic compounds are used as herbicides and insecticides and various alloys
- found in arsenopyrite and orpiment and realgar
noun
a United States territory on the eastern part of the island of Samoa
Synonyms
American Samoa
Eastern Samoa
adverb
to the same degree (often followed by `as')
Synonyms
Examples
- they were equally beautiful
- birds were singing and the child sang as sweetly
- sang as sweetly as a nightingale
- he is every bit as mean as she is
noun
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron)
Synonyms
Examples
- used to specify wavelengths of electromagnetic radiation
noun
any of several fat-soluble vitamins essential for normal vision
Synonyms
Examples
- prevents night blindness or inflammation or dryness of the eyes
noun
one of the four nucleotides used in building DNA
Synonyms
deoxyadenosine monophosphate
A
Examples
- all four nucleotides have a common phosphate group and a sugar (ribose)
noun
(biochemistry) purine base found in DNA and RNA
Synonyms
Examples
- pairs with thymine in DNA and with uracil in RNA
noun
the basic unit of electric current adopted under the Systeme International d'Unites
Synonyms
Examples
- a typical household circuit carries 15 to 50 amps
noun
the 1st letter of the Roman alphabet
Synonyms
A
a
noun
the blood group whose red cells carry the A antigen
Synonyms
A
type A
group A