· a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar

Synonym(s): arsenic, atomic_number_33

Hypernym(s): chemical_element, element

· a United States territory on the eastern part of the island of Samoa

Synonym(s): American_Samoa, Eastern_Samoa, AS

· a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

Synonym(s): angstrom, angstrom_unit

Hypernym(s): metric_linear_unit

· any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

Synonym(s): vitamin_A, antiophthalmic_factor, axerophthol

Hypernym(s): fat-soluble_vitamin

· one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

Synonym(s): deoxyadenosine_monophosphate

Hypernym(s): nucleotide, base

· (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

Synonym(s): adenine

Hypernym(s): purine

· the basic unit of electric current adopted under the Systeme International d'Unites; "a typical household circuit carries 15 to 50 amps"

Synonym(s): ampere, amp

Hypernym(s): current_unit

· the 1st letter of the Roman alphabet

Synonym(s): a

Hypernym(s): letter, letter_of_the_alphabet, alphabetic_character

· the blood group whose red cells carry the A antigen

Synonym(s): type_A, group_A

Hypernym(s): blood_group, blood_type

· to the same degree (often followed by `as'); "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"

Synonym(s): equally, as, every_bit