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B

PRIMARY MEANINGS OF: B

1
 n
the 2nd letter of the Roman alphabet
2
 n
the blood group whose red cells carry the B antigen
3
 n
originally thought to be a single vitamin but now separated into several B vitamins
4
 n
a logarithmic unit of sound intensity equal to 10 decibels
5
 n
a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
6
 n
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
FULL DEFINITIONS OF: B
1

n the 2nd letter of the Roman alphabet

Synonyms:
b
Type of:
alphabetic character, letter, letter of the alphabet
the conventional characters of the alphabet used to represent speech
2

n the blood group whose red cells carry the B antigen

Synonyms:
group B, type B
Type of:
blood group, blood type
human blood cells (usually just the red blood cells) that have the same antigens
3

n originally thought to be a single vitamin but now separated into several B vitamins

Synonyms:
B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex
Types:
show 10 types...
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choline
a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat
inositol
an optically inactive alcohol that is a component of the vitamin B complex
pantothen, pantothenic acid
a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods
aneurin, antiberiberi factor, thiamin, thiamine, vitamin B1
a B vitamin that prevents beriberi; maintains appetite and growth
antipernicious anemia factor, cobalamin, cyanocobalamin, vitamin B12
a B vitamin that is used to treat pernicious anemia
hepatoflavin, lactoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G
a B vitamin that prevents skin lesions and weight loss
adermin, pyridoxal, pyridoxamine, pyridoxine, vitamin B6
a B vitamin that is essential for metabolism of amino acids and starch
folacin, folate, folic acid, pteroylglutamic acid, pteroylmonoglutamic acid, vitamin Bc, vitamin M
a B vitamin that is essential for cell growth and reproduction
niacin, nicotinic acid
a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract
biotin, vitamin H
a B vitamin that aids in body growth
Type of:
water-soluble vitamin
any vitamin that is soluble in water
4

n a logarithmic unit of sound intensity equal to 10 decibels

Synonyms:
Bel
Type of:
sound unit
any acoustic unit of measurement
5

n a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

Synonyms:
atomic number 5, boron
Type of:
chemical element, element
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
6

n aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil

Synonyms:
bacillus
Types:
Bacillus anthracis, anthrax bacillus
a species of bacillus that causes anthrax in humans and in animals (cattle and swine and sheep and rabbits and mice and guinea pigs); can be used a bioweapon
Bacillus globigii, Bacillus subtilis, grass bacillus, hay bacillus
a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics
Yersinia pestis
a bacillus bacterium that causes the plague; aerosolized bacteria can be used as a bioweapon
Type of:
eubacteria, eubacterium, true bacteria
a large group of bacteria having rigid cell walls; motile types have flagella
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