19-letter words containing o, n, h, a

geothermal gradient — the increase in temperature with increasing depth within the earth.
get the hang of sth — If you get the hang of something such as a skill or activity, you begin to understand or realize how to do it.
giant silkworm moth — any silkworm moth of the family Saturniidae.
glottochronological — Of or pertaining to glottochronology.
go jump in the lake — a body of fresh or salt water of considerable size, surrounded by land.
go on a/the rampage — If people go on a rampage, they rush around in a wild or violent way, causing damage or destruction.
go to great lengths — If you say that someone goes to great lengths to achieve something, you mean that they try very hard and perhaps do extreme things in order to achieve it.
go under the hammer — to be offered for sale by an auctioneer
goes without saying — If something goes without saying, it is obvious.
goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
grand duke nicholas — of Cusa [kyoo-zuh] /ˈkyu zə/ (Show IPA), 1401–1464, German cardinal, mathematician, and philosopher. German Nikolaus von Cusa.
grandfather's clock — a pendulum floor clock having a case as tall as or taller than a person; tall-case clock; long-case clock.
grandmother's clock — a pendulum clock similar to a grandfather's clock but shorter.
graphic workstation — (graphics, computer) A workstation specifically configured for graphics works such as image manipulation, bitmap graphics ("paint"), and vector graphics ("draw") type applications. Such work requires a powerful CPU and a high resolution display. A graphic workstation is very similar to a CAD workstation and, given the typical specifications of personal computers currently available in 1999, the distinctions are very blurred and are more likely to depend on availability of specific software than any detailed hardware requirements.
great idaean mother — Cybele.
great wall of china — a system of fortified walls with a roadway along the top, constructed as a defense for China against the nomads of the regions that are now Mongolia and Manchuria: completed in the 3rd century b.c., but later repeatedly modified and rebuilt. 2000 miles (3220 km) long.
gulf of tehuantepec — an inlet of the Pacific on the south coast of the Isthmus of Tehuantepec in S Mexico
hamiltonian problem — (computability) (Or "Hamilton's problem") A problem in graph theory posed by William Hamilton: given a graph, is there a path through the graph which visits each vertex precisely once (a "Hamiltonian path")? Is there a Hamiltonian path which ends up where it started (a "Hamiltonian cycle" or "Hamiltonian tour")? Hamilton's problem is NP-complete. It has numerous applications, sometimes completely unexpected, in computing.
handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
hang five (or ten) — to ride a surfboard with the toes of one (or both) feet draped over the front edge of the board
hang on the lips of — to listen to with close attention
hanging indentation — a style of text-setting in which the first line of a paragraph is set to the full measure and subsequent lines are indented at the left-hand side
harbinger-of-spring — a North American umbelliferous herb, Erigenia bulbosa, having white flowers that bloom early in the spring.
harmonic distortion — distortion caused by nonlinear characteristics of electronic apparatus, esp of audio amplifiers, that generate unwanted harmonics of the input frequencies
hate someone's guts — to hate someone intensely
haute vulgarisation — vulgarization, or popularization, on a higher level, esp. as done by academics, scholars, etc.
have a bone to pick — to have grounds for a quarrel
have a few too many — If you say that someone has had a few too many or has had a few, you mean that they have drunk too many alcoholic drinks.
have a good mind to — (in a human or other conscious being) the element, part, substance, or process that reasons, thinks, feels, wills, perceives, judges, etc.: the processes of the human mind.
have a nose for sth — If you say that someone has a nose for something, you mean that they have a natural ability to find it or recognize it.
have a weakness for — be fond of
have an ax to grind — an instrument with a bladed head on a handle or helve, used for hewing, cleaving, chopping, etc.
have designs on sth — If someone has designs on something, they want it and are planning to get it, often in a dishonest way.
have half a mind to — to have the intention of
have one's blood up — to be or cause to be angry or inflamed
have one's way with — manner, mode, or fashion: a new way of looking at a matter; to reply in a polite way.
have the makings of — show potential as
haves and have-nots — If you refer to two groups of people as haves and have-nots, you mean that the first group are very wealthy and the second group are very poor. You can also refer generally to poor people as have-nots.
health professional — a person trained to work in any field of physical or mental health.
heart in your mouth — If your heart is in your mouth, you feel very excited, worried, or frightened.
heat of sublimation — the heat absorbed by one gram or unit mass of a substance in the process of changing, at a constant temperature and pressure, from a solid to a gaseous state. Compare sublime (def 10).
heel-and-toe racing — race walking.
henry david thoreau — Henry David, 1817–62, U.S. naturalist and author.
henry the navigator — Prince, 1394–1460, prince of Portugal.
hepatic portal vein — a vein connecting two capillary networks in the liver
heptachlorobiphenyl — (organic compound) Either of twenty-four isomers of the polychlorinated biphenyl containing seven chlorine atoms.
hermitian conjugate — adjoint (def 2).
hexafluoroplatinate — (chemistry) The univalent anion PtF6- prepared by reacting platinum hexafluoride with certain metals or other elements.
hildegard of bingen — Hildegard von (Hildegard of Bingen"Sibyl of the Rhine") 1098–1178, German nun, healer, writer, and composer.
hold up one's hands — to confess a mistake or misdeed

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