H, h
[ eych ]
/ eɪtʃ /
noun, plural H's or Hs, h's or hs.
the eighth letter of the English alphabet, a consonant.
any spoken sound represented by the letter H or h, as in hot or behave.
something having the shape of an H.
a written or printed representation of the letter H or h.
a device, as a printer's type, for reproducing the letter H or h.
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A Brief History Of The Letter HThough it’s a high-value letter in Scrabble and Words with Friends, H is a relatively common letter. Statistically speaking, it is the eighth most commonly used letter in the English language. That’s because H is usually paired with other consonants like wh, ch, sh, and gh. H is found in the most common two-letter pair (th) and in the most common three-letter combination (the). (The letter …
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Definition for h (2 of 12)
Definition for h (3 of 12)
Definition for h (4 of 12)
Definition for h (5 of 12)
H
Symbol.
the eighth in order or in a series.
Chemistry. hydrogen.
Biochemistry. histidine.
Physics.
- enthalpy.
- horizontal component of the earth's magnetic field.
- magnetic intensity.
Music. the letter used in German to indicate the tone B.
Definition for h (6 of 12)
Definition for h (7 of 12)
Definition for h (8 of 12)
Definition for h (9 of 12)
hr.
or h
hour; hours.
Definition for h (10 of 12)
h.
or H.
Definition for h (11 of 12)
H.
(in prescriptions) an hour.
Origin of H.
From the Latin word hōra
Definition for h (12 of 12)
eta
[ ey-tuh, ee-tuh ]
/ ˈeɪ tə, ˈi tə /
noun
the seventh letter of the Greek alphabet (H, η).
the vowel sound represented by this letter.
Origin of eta
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for h
British Dictionary definitions for h (1 of 8)
h
H
/ (eɪtʃ) /
noun plural h's, H's or Hs
the eighth letter and sixth consonant of the modern English alphabet
a speech sound represented by this letter, in English usually a voiceless glottal fricative, as in hat
- something shaped like an H
- (in combination)an H-beam
British Dictionary definitions for h (2 of 8)
British Dictionary definitions for h (3 of 8)
H
symbol for
abbreviation for
Hungary (international car registration)
British Dictionary definitions for h (4 of 8)
eta
1/ (ˈiːtə) /
noun
the seventh letter in the Greek alphabet (Η, η), a long vowel sound, transliterated as e or ē
Word Origin for eta
Greek, of Phoenician origin; compare Hebrew heth
British Dictionary definitions for h (5 of 8)
eta
2/ (ˈeɪtə) /
noun plural eta or etas
(in Japan, formerly) a member of a class of outcasts who did menial and dirty tasks
Word Origin for eta
C19: Japanese
British Dictionary definitions for h (6 of 8)
ETA
1abbreviation for
estimated time of arrival
British Dictionary definitions for h (7 of 8)
ETA
2/ (ˈɛtə) /
n acronym for
Euzkadi ta Askatsuna: an organization of militant Basque nationalists attempting to gain independence for the Basques, esp those ruled by Spain, until a ceasefire in 1998, by means of guerrilla warfare
Word Origin for ETA
Basque, literally: Basque Nation and Liberty
British Dictionary definitions for h (8 of 8)
h.
H.
abbreviation for
harbour
height
hour
husband
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for h (1 of 3)
h
The symbol forPlanck's constant
Medicine definitions for h (2 of 3)
H
The symbol for the elementhydrogen
Medicine definitions for h (3 of 3)
eta
[ ā′tə, ē′tə ]
n.
The seventh letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for h (1 of 3)
h
Abbreviation of height
The symbol for Planck's constant.
Science definitions for h (2 of 3)
H
The symbol for henry.
The symbol for hydrogen.
Science definitions for h (3 of 3)
hydrogen
[ hī′drə-jən ]
H
The lightest and most abundant element in the universe, normally consisting of one proton and one electron. It occurs in water in combination with oxygen, in most organic compounds, and in small amounts in the atmosphere as a gaseous mixture of its three isotopes (protium, deuterium, and tritium) in the colorless, odorless compound H2. Hydrogen atoms are relatively electropositive and form hydrogen bonds with electronegative atoms. In the Sun and other stars, the conversion of hydrogen into helium by nuclear fusion produces heat and light. Hydrogen is used to make rocket fuel, synthetic ammonia, and methanol, to hydrogenate fats and oils, and to refine petroleum. The development of physical theories of electron orbitals in hydrogen was important in the development of quantum mechanics. Atomic number 1; atomic weight 1.00794; melting point -259.14°C; boiling point -252.8°C; density at 0°C 0.08987 gram per liter; valence 1. See Periodic Table. See Note at oxygen.
The American Heritage® Science Dictionary
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