(particles) A strongly interacting particle such as a proton. A particle which is affected by the strong nuclear force. A hadron is composed of quarks.
(physics) The time required for half of the nucleus, nuclei in a sample of a specific isotope to undergo radioactive decay.
(chemistry) In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
(medicine) The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacologic, physiologic, or radiologic activity. Year introduced in w:MeSH: 1974(1971)
(culture) The time it takes for an idea or a fashion to lose half of its influential power. "Most books of scholarship have surprisingly short intellectual half-lives during which they make a difference" (Robert Ackerman, 1991. Introduction to Jane Ellen Harrison's Prolegomena to the Study of Greek Religion (1903).)
Resistant to pressure.
Requiring a lot of effort to do or understand
a hard problem
Demanding a lot of effort to endure.
a hard life
(context, of a person) , severe, harsh, unfriendly, brutal.
Of drink, strong.
Of water, high in dissolved calcium compounds.
(context, slang, vulgar) Sexually aroused.
(bodybuilding) Having muscles that are tightened as a result of intense, regular exercise.
adverb (harder, hardest)
With much strength or energy
Pertaining to harmony.
Pleasant to hear; harmonious; melodious.
(uncountable, physics) thermal energy
This furnace puts out 5000 BTUs of .
That engine is really throwing off some .
Removal of from the liquid caused it to turn into a solid.
(uncountable) The condition or quality of being hot.
Stay out of the of the sun!
(uncountable) An attribute of a spice that causes a burning sensation in the mouth.
The chili sauce gave the dish .
(uncountable) A period of intensity, particularly of emotion.
It's easy to make bad decisions in the of the moment
(uncountable) An undesirable amount of attention.
The from her family after her DUI arrest was unbearable.
(uncountable) (slang) The police.
''The ! Scram!
(uncountable) (slang) A gun.
He's packing .
(countable) (baseball) A fastball.
The catcher called for the , high and tight.
(uncountable) A condition where a mammal is aroused sexually or where it is especially fertile and therefore eager to engage in sexual intercourse
The male canines were attracted by the female in .
(countable) A preliminary race, used to determine the participants in a final race
The runner had high hopes, but was out of contention after the first .
(countable) One cycle of bringing metal to maximum temperature and working it until it is too cool to work further
I can make a scroll like that in a single .
(countable) A hot spell<span id="heat13"></span>.
The children stayed indoors during the summer heats.
To cause an increase in temperature of an object or space; to cause something to become hot; often with "up".
I'll up the water.
to arouse, to excite (sexually)
The massage heated her up.
A villain or bad guy; the one responsible for evil or aggressive acts.
With his wrinkled, uneven face, the actor always seemed to play the in films.
(slang) A doorman, bouncer
A fight started outside the bar then the heavies came out and stopped it.
adjective (heavier, heaviest)
(context, of a physical object) Having great weight.
(context, of a topic) serious, Serious, somber.
(context, UK, slang) Good.
This film is .
(context, of a rate of flow) high, High, great.
(context, UK, slang) Armed.
Come , or not at all.
(context, Music terminology) louder, more distorted
(physics) In quantum mechanics, the principle that there is an absolute limit on the combined accuracy of certain pairs of simultaneous, related measurements, especially that of the position and momentum of a particle.
In the International System of Units, the derived unit of frequency; one (period or cycle of any periodic event) per second. Symbol: Hz
(particles) A hypothetical elementary particle predicted by the standard model; a boson with zero spin, it is thought to give mass to other particles.
nounw:Hooke's law, Hooke's law
(physics) the principle that the stress applied to a solid is directly proportional to the strain produced. This law describes the behavior of springs and solids stressed within their elastic limit.
noun (wikipedia, hotspot (geology)) (plural hot spots)
(geology) the surface manifestation of a plume that rises from deep in the Earth"s mantle
a dangerous place of violent political unrest
a lively and entertaining place, such as a nightclub
an area of radioactive contamination
(genetics) the region of a gene in which there is higher than normal rate of mutation
(computing) a location in which WiFi? Internet access is available
(wikipedia, hotspot (wifi))
(physics) A quantum characteristic of a group of subatomic particles governed by the strong force that is related to strangeness and is represented by a number equal to twice the average value of the electric charge of the group.
(physics) a closely spaced structure of lines in the spectrum of an atom or molecule due to nuclear isotopic effects and/or to nuclear spin
(physics) Any baryon with a non-zero strangeness.
(context, of a speed) equal to, or greater than 5 times the speed of sound.
A property of a system such that an output value is not a strict function of the corresponding input, but also incorporates some lag, delay, or history dependence, and in particular when the response for a decrease in the input variable is different from the response for an increase. For example, a thermostat with a nominal setpoint of 75° might switch the controlled heat source on when the temperature drops below 74°, and off when it rises above 76°.