English Words: H
23,837 words · Page 80 of 477
A hypothetical state of the universe prior to the Planck epoch, in which time did not exist, only space.
A measure of uncertainty. If a sample from a finite set A uniformly at random is picked, the information revealed after the outcome is known is given by the Hartley function H_0(A):=log_b|A|, where |A| denotes the cardinality of A.
An electronic oscillator circuit in which the oscillation frequency is determined by a tuned circuit consisting of capacitors and inductors.
An integral transform closely related to the Fourier transform, but which transforms real-valued functions to real-valued functions.
A village and civil parish in Hart district, Hampshire, England (OS grid ref SU7656).
Of or relating to David Hartley (1705–1757), English philosopher and founder of the associationist school of psychology.
Of or relating to Robert S. Hartman (1910-1973), logician and philosopher in the field of axiology.
A mountain zebra of subspecies Equus zebra hartmannae, found in southwestern Angola and western Namibia, and having a dewlap and an unstriped belly.
An autosomal-recessive metabolic disorder affecting the absorption of nonpolar amino acids.
For a given set X, the cardinality of the least ordinal number α such that there is no injection from α into X.
The atomic unit of energy, defined as 2R_∞hc, where R_∞ is the Rydberg constant, h is the Planck constant and c is the speed of light. It equals 4.35974 attojoules.
The product of a series of solutions to the Schrödinger equation for individual electrons, used as an approximation in the Hartree equation.
A method of approximation for the determination of the wavefunction and the energy of a quantum many-body system in a stationary state.
Spelling & Dictionary Insight
The English alphabetical index for the letter H contains 23,837 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 477 pages, and you are currently viewing page 80. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "H" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.