h | | |
n. (substance) | 1. atomic number 1, h, hydrogen | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe. |
| ~ tritium | a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms. |
| ~ chemical element, element | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter. |
| ~ h2o, water | binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent. |
| ~ gas | a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely. |
n. (quantity) | 2. h, henry | a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second. |
| ~ inductance unit | a measure of the property of an electric circuit by which an electromotive force is induced in it. |
| ~ abhenry | a unit of inductance equal to one billionth of a henry. |
| ~ millihenry | a unit of inductance equal to one thousandth of a henry. |
n. (quantity) | 3. h, planck's constant | the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second. |
| ~ constant of proportionality, factor of proportionality | the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality. |
n. (communication) | 4. h | the 8th letter of the Roman alphabet. |
| ~ latin alphabet, roman alphabet | the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe. |
| ~ alphabetic character, letter of the alphabet, letter | the conventional characters of the alphabet used to represent speech.; "his grandmother taught him his letters" |
n. (attribute) | 5. enthalpy, h, heat content, total heat | (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure.; "enthalpy is the amount of energy in a system capable of doing mechanical work" |
| ~ physical property | any property used to characterize matter and energy and their interactions. |
| ~ thermodynamics | the branch of physics concerned with the conversion of different forms of energy. |
hi | | |
n. (communication) | 1. hello, hi, how-do-you-do, howdy, hullo | an expression of greeting.; "every morning they exchanged polite hellos" |
| ~ greeting, salutation | (usually plural) an acknowledgment or expression of good will (especially on meeting). |
n. (location) | 2. aloha state, hawai'i, hawaii, hi | a state in the United States in the central Pacific on the Hawaiian Islands. |
| ~ dolphin, dolphinfish, mahimahi | large slender food and game fish widely distributed in warm seas (especially around Hawaii). |
| ~ lanai | a veranda or roofed patio often furnished and used as a living room. |
| ~ uke, ukulele | a small guitar having four strings. |
| ~ hawaiian | the Oceanic languages spoken on Hawaii. |
| ~ luau | an elaborate Hawaiian feast or party (especially one accompanied by traditional foods and entertainment). |
| ~ dolphinfish, mahimahi | the lean flesh of a saltwater fish found in warm waters (especially in Hawaii). |
| ~ haleakala national park | a national park in Hawaii including a dormant volcano. |
| ~ hawaii volcanoes national park | a national park in Hawaii featuring active volcanoes. |
| ~ american state | one of the 50 states of the United States. |
| ~ america, the states, u.s.a., united states, united states of america, us, usa, u.s. | North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776. |
| ~ hilo | a town in Hawaii on the island of Hawaii. |
| ~ hawaiian islands, sandwich islands | a group of volcanic and coral islands in the central Pacific. |
| ~ malahini | a newcomer to Hawaii. |
| ~ macadamia nut, macadamia nut tree, macadamia ternifolia | small Australian tree with racemes of pink flowers; widely cultivated (especially in Hawaii) for its sweet edible nuts. |
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