hectolitre
A unit of volume or capacity equivalent to 100 litres. Symbol: hL

hectolitres
plural of hectolitre

hectometer
US spelling of hectometre.

hectometers
plural of hectometer

hectometre
An SI unit of length equal to 100 metres. Symbol: hm

hectometres
plural of hectometre

hectopascal
An SI unit of pressure equal to 10² pascals. Symbol: hPa

hectostere
An old measure of volume equal to one hundred cubic metres.

hectosteres
plural of hectostere

hectowatt
A unit of power equal to 100 watts.

hectowatts
plural of hectowatt

hedgeful
An amount held in a hedge.

hedgefuls
plural of hedgeful

hedgesful
plural of hedgeful

hedon
A unit of pleasure used to theoretically weigh people's happiness.

hedonometrics
The measurement of happiness

hedons
plural of hedon

heer
A yarn measure of six hundred yards, or 1/24 of a spindle.

heers
plural of heer

hekat
Alternative spelling of heqat.

hekats
plural of hekat

hektare
Dated form of hectare.

hektares
plural of hektare

helek
A unit of time equal to an eighteenth of a minute (3⅓ seconds)

heliometer
An astronomical instrument, based on a telescope, for measuring the diameter of the sun; now used to measure the angular distance between stars and other celestial bodies.

heliometers
plural of heliometer

helium
The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
A form or sample of the element.

heliums
plural of helium

helluvalot
A very large amount.

helonium
Synonym of helium hydride.

hematocrit
The percentage (by volume) of packed red blood cells in a centrifuged sample of blood.
A centrifuge used to analyze the relative amount of red blood cells and plasma in blood.

hematocrits
plural of hematocrit

hematometer
Alternative form of haematometer.

hematometers
plural of hematometer

hemiekta
plural of hemiekton

hemiekton
An ancient Attic dry measure of capacity, equivalent to 4.36 litres.

hemilineage
lineage of either the male or the female line

hemilineages
plural of hemilineage

hemina
A Roman unit of liquid measure reckoned as the volume of ⁵⁄₆ Roman pound of wine, equivalent to around 0.27 L.

heminae
plural of hemina

heminas
plural of hemina

hemispermatophore
Either distinct half of a spermatophore

hemispermatophores
plural of hemispermatophore

hemline
The line formed by the bottom edge of a skirt, dress, or coat; hem.
The height of this line, measured from the floor.

hemlines
plural of hemline

hemoconcentration
An increase in the amount of large molecules and other solid elements in the blood, as a result of a change in water balance

hemoconcentrations
plural of hemoconcentration

hemocytopenia
cytopenia

hemocytopenias
plural of hemocytopenia

hemodilation
Misspelling of hemodilution.

hemodilution
An increase in the fluid content of blood (and thus a diminution of the number of cells).

hemodilutions
plural of hemodilution

hemoglobinemia
The presence of free (unbound) hemoglobin in the blood (which is always true to a low degree); especially, more than normal amounts of it (hyperhemoglobinemia), in contrast with the usual situation wherein almost all hemoglobin is carried inside erythrocytes; it is a sign of hemolysis.

heptamethylnonane
The aliphatic hydrocarbon with the assigned cetane number of zero.

heptapodies
plural of heptapody

heptapody
A measure or series consisting of seven feet.

heptaquark
Any hypothetical composite particle composed of seven quarks or antiquarks.

heptaquarks
plural of heptaquark

heptaseme
a unit of seven morae or units of time.

heptasemes
plural of heptaseme

heqat
An Ancient Egyptian dry measure of volume equivalent to 10 hins (or about 4.8 litres).

heresay
Misspelling of hearsay.

hesp
A measure of two hanks of linen thread.

hesps
plural of hesp

hetaireia
A unit of the Byzantine emperor's bodyguard.

hetaireiai
plural of hetaireia

hetaireias
plural of hetaireia

heterarchies
plural of heterarchy

heterarchy
The rule of an alien; rule from without; government by an extraterritorial power.
An example of this government.
A system of organization where the elements of the organization are unranked (non-hierarchical) or where they possess the potential to be ranked a number of different ways.

heteroplasmon
cytohet

heteroplasmons
plural of heteroplasmon

heteroploids
plural of heteroploid

heterosquare
An n-by-n arrangement of n² numbers such that the numbers in each row, in each column and along both diagonals all have different sums.

heterosquares
plural of heterosquare

heterotopia
Normal tissue (or an organ) present at an abnormal part of the body
The occurrence of an organism in a number of different habitats
A space which is alien to what is normal within the society, variably presenting a utopian vision in physical form or serving to segregate subversive elements from the wider society.

heterotopias
plural of heterotopia

hexacoordination
coordination in which the coordination number is 6

hexade
A series of six numbers.

hexadecanion
An alternative name for a sedenion, a 16-dimensional hypercomplex number or a 16-dimensional number constructed by doubling the quaternion.

hexadecanions
plural of hexadecanion

hexadecimals
plural of hexadecimal

hexades
plural of hexade

hexaflexagon
A hexagonal flexagon.

hexaflexagons
plural of hexaflexagon

hexahexaflexagon
A hexagonal flexagon with a total of six faces.

hexahexaflexagons
plural of hexahexaflexagon

hexapodies
plural of hexapody

hexapody
A verse or measure of six metrical feet.
The property of being a hexapod; six-leggedness.

hexaquark
Any exotic particle composed of six quarks

hexaquarks
plural of hexaquark

hexatrigesimals
plural of hexatrigesimal.

hexavigesimals
plural of hexavigesimal.

hidage
A tax formerly paid to the kings of England for every hide of land.
The total area of land, measured in hides.

hidages
plural of hidage

hidato
A puzzle game in which the player fills in boxes with numbers, attempting to fill the grid with consecutive numbers that connect either horizontally, vertically, or diagonally.

hidatos
plural of hidato

hidoku
a puzzle where a diagram is filled with numbers between 1 and the number of cells of the diagram, each number is used exactly once, and consecutive numbers must be orthogonally or diagonally adjacent.

hidokus
plural of hidoku

highjinks
Alternative spelling of high jinks.

highliner
A successful fisherman who catches significant numbers of fish.

highliners
plural of highliner

hijinks
Alternative spelling of high jinks.

hijinx
Alternative spelling of high jinks.

hijinxs
Alternative spelling of hijinks.

hilarities
plural of hilarity

hilarity
A great amount of amusement, usually accompanied by much laughter.
Something that induces much laughter.

hin
A former Hebrew liquid measure of volume (about 3.8 L).
An Ancient Egyptian liquid measure of volume (about 0.48 L).

hins
plural of hin

hipflask
Alternative spelling of hip flask.

hipflasks
plural of hipflask

hippocentaur
centaur

hippocentaurs
plural of hippocentaur

hitpoint
Alternative form of hit point.

hitpoints
plural of hitpoint

hiveful
The amount contained in a hive.

hivefuls
plural of hiveful

hoeful
The amount held or moved by a hoe at once.

hogshead
A cask of a certain size; its volume used as a measure of capacity for liquids, containing 63 wine gallons, or about 52+¹⁄₂ imperial gallons (a half pipe).
A large barrel or cask of indefinite contents, especially one containing from 100 to 140 gallons.

hogsheads
plural of hogshead

hojillion
An unspecified large number (of).

hojillions
plural of hojillion

holers
plural of holer

holophotometer
A kind of photometer designed to measure the light emanating in all directions from a source.

holophotometers
plural of holophotometer

holyhedra
plural of holyhedron