1. bric-a-brac
noun. miscellaneous curios.
Synonyms
- whatnot
- rarity
- knickknack
- knickknackery
- oddity
- oddment
- nicknack
- curio
- curiosity
Antonyms
- abundance
- familiarity
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2. A-bomb
noun. a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239).
Synonyms
- fission bomb
- dirty bomb
- atomic weapon
- neutron bomb
- atomic bomb
- plutonium bomb
- atom bomb
- clean bomb
- plutonium pit
- nuclear weapon
- plutonium trigger
Antonyms
- smart bomb
- defend
- pass
3. A
noun. 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
- micromicron
- micromillimeter
- millimicron
- picometer
- nanometer
- metric linear unit
- micromillimetre
- picometre
- nanometre
- angstrom unit
- angstrom
4. A
noun. the 1st letter of the Roman alphabet.
Synonyms
- a
- letter of the alphabet
- alphabetic character
- Latin alphabet
- Roman alphabet
Antonyms
- legitimate
- right
- superior
5. A
noun. the basic unit of electric current adopted under the Systeme International d'Unites.
Synonyms
- milliampere
- abampere
- mA
- abamp
- current unit
- amp
6. A
noun. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose).
Synonyms
- deoxyadenosine monophosphate
- nucleotide
7. a
noun. ['ə, ˈeɪ'] the 1st letter of the Roman alphabet.
Synonyms
- A
- letter of the alphabet
- alphabetic character
- Latin alphabet
- Roman alphabet
Etymology
- a (Middle English (1100-1500))
8. A
noun. the blood group whose red cells carry the A antigen.
Synonyms
- blood type
- type A
- blood group
Antonyms
- exon
- outfield
- noble
- incidental
9. A
noun. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes.
Synonyms
- fat-soluble vitamin
- antiophthalmic factor
- dehydroretinol
- vitamin A1
- axerophthol
- retinol
- vitamin A2
10. A
noun. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA.
Synonyms
- purine
- DNA
- deoxyribonucleic acid
- RNA
- ribonucleic acid
- desoxyribonucleic acid