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H

H

4 8.9
The symbol for enthalpy, the total heat in a system
  • noun
  • Specialized
translation icon : entalpía
  • The model requires three parameters (N 1994, either H or h, and r) and distributions for those parameters.

Examples

  • A similar precaution should be taken if a patient with manifest H-P dysfunction, such as bundle-branch block, is given a drug with sodium channel-blocking properties.

    Academic text (2016)
  • The optimization methodology utilizes all data above the roughness-element height H, with data below H discarded.

    Academic text (2018)
  • For instance, the corresponding H matrix for M 53 is given in Table 2.

    Academic text (1997)
  • Such effects give rise to E or H field components along the direction of propagation.

    Academic text (1995)
  • One of the ways in which I use the H-index is when making tenure recommendations.

    Blog text (18)
  • The number of leakage episodes decreased from a mean of 4 to 0.3 per 24 h.

    Academic text (2000)
  • Lower panel: Image from decoration experiment with H = 0.1 kOe along c, at 4.2 K, showing a conventional hexagonal flux-line lattice.

    Academic text (1998)
  • In thermodynamics, H represents the heat content of a system during a process.

  • The scientist calculated the H value to determine the system's energy changes.

  • To understand its behavior, we must know the H of the gas in the container.

Synonyms

heat content
vsH
  • Specialized
2 6.7

The total energy in a system, including energy from pressure and volume

is represented by a single-letter symbol rather than the written name
enthalpy
vsH
  • Specialized
1 9.9

A measure of the total heat inside a system used in energy changes

is represented by a single-letter symbol rather than the written name
total heat
vsH
  • Specialized
1 7.0

The amount of energy inside a system plus its pressure times its volume

is represented by a single-letter symbol rather than the written name

Compounds

H-bomb
  • NSFW
3 4.0

A very powerful nuclear weapon that explodes by joining hydrogen atoms

Big H
  • NSFW
1 9.9

A street name for the illegal drug heroin

A mild, funny phrase people say instead of swearing when surprised or angry

the h-word
  • Informal
9.9

A polite way to mention the word hate without saying it

vitamin H
  • Archaic
3.9

A nutrient the body needs to grow and make energy from food

How Much

H
  • Specialized
4 8.9
enthalpy
  • Specialized
1 9.9

Surface Forms

H singular
Hs plural

Etymology

H used for enthalpy comes from the word enthalpy, built from Greek en- 'in' and a root meaning 'heat'. So H shows the total heat content 'inside' a system, which is why scientists use it for that quantity.