| arbor | (noun) a framework that supports climbing plants | Synonyms: arbour, bower, pergola |
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| (noun) any of various rotating shafts that serve as axes for larger rotating parts | Synonyms: mandrel, mandril, spindle |
| (noun) tree (as opposed to shrub) | - |
| arboraceous | (adjective) abounding in trees | Synonyms: arboreous, woodsy, woody |
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| arborary | (adjective) of or relating to or formed by trees | Synonyms: arboreal, arborical, arborous |
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| arboreal | (adjective) inhabiting or frequenting trees | Synonyms: arboreous, tree-living |
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| (adjective) of or relating to or formed by trees | Synonyms: arborary, arborical, arborous |
| (adjective) resembling a tree in form and branching structure | Synonyms: arboreous, arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
| arboreous | (adjective) inhabiting or frequenting trees | Synonyms: arboreal, tree-living |
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| (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
| (adjective) abounding in trees | Synonyms: arboraceous, woodsy, woody |
| arborescent | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| arboresque | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arborescent, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| arboretum | (noun) a facility where trees and shrubs are cultivated for exhibition | Synonyms: botanical garden |
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| arborical | (adjective) of or relating to or formed by trees | Synonyms: arborary, arboreal, arborous |
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| arboriculture | (noun) the tending of and caring for trees | Synonyms: tree farming |
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| arboriculturist | (noun) someone trained in forestry | Synonyms: forester, tree farmer |
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| arboriform | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arborescent, arboresque, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| arborise | (verb) branch out like trees | Synonyms: arborize |
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| arborist | (noun) a specialist in treating damaged trees | Synonyms: tree surgeon |
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| arborize | (verb) branch out like trees | Synonyms: arborise |
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| arborolatry | (noun) the worship of trees | Synonyms: tree-worship |
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| arborous | (adjective) of or relating to or formed by trees | Synonyms: arborary, arboreal, arborical |
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| arborvirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arbovirus |
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| arborvitae | (noun) any of several Asian and North American conifers of the genera Thuja and Thujopsis | - |
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| arbour | (noun) a framework that supports climbing plants | Synonyms: arbor, bower, pergola |
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| arbovirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arborvirus |
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| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| carbocyclic | (adjective) having or relating to or characterized by a ring composed of carbon atoms | - |
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| carbohydrate | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: saccharide, sugar |
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| carbolated | (adjective) containing or treated with carbolic acid | - |
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| carbomycin | (noun) a colorless basic antibiotic that inhibits the growth of Gram-positive organisms | - |
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| carbon | (noun) a copy made with carbon paper | Synonyms: carbon copy |
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| (noun) an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds | Synonyms: atomic number 6, C |
| (noun) a thin paper coated on one side with a dark waxy substance (often containing carbon); used to transfer characters from the original to an under sheet of paper | Synonyms: carbon paper |
| carbonaceous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonic, carboniferous, carbonous |
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| carbonado | (noun) a piece of meat (or fish) that has been scored and broiled | - |
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| (noun) an inferior dark diamond used in industry for drilling and polishing | Synonyms: black diamond |
| carbonara | (noun) sauce for pasta; contains eggs and bacon or ham and grated cheese | - |
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| carbonate | (noun) a salt or ester of carbonic acid (containing the anion CO3) | - |
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| (verb) treat with carbon dioxide | - |
| (verb) turn into a carbonate | - |
| carbonated | (adjective) having carbonation (especially artificially carbonated) | - |
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| carbonation | (noun) saturation with carbon dioxide (as soda water) | - |
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| carbonator | (noun) a device that carries out carbonation. | Synonyms: soda carbonator, soda maker |
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| carbonic | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonaceous, carboniferous, carbonous |
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| carboniferous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonaceous, carbonic, carbonous |
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| (adjective) of or relating to the Carboniferous geologic era | - |
| carbonisation | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonization |
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| carbonise | (verb) turn into carbon, as by burning | Synonyms: carbonize |
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| (verb) unite with carbon | Synonyms: carbonize, carburise, carburize |
| carbonization | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonisation |
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| carbonize | (verb) turn into carbon, as by burning | Synonyms: carbonise |
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| (verb) unite with carbon | Synonyms: carbonise, carburise, carburize |
| carbonous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonaceous, carbonic, carboniferous |
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| carbonyl | (adjective) relating to or containing the carbonyl group | Synonyms: carbonylic |
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| (noun) a compound containing metal combined with carbon monoxide | - |
| carbonylic | (adjective) relating to or containing the carbonyl group | Synonyms: carbonyl |
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| carborundum | (noun) an abrasive composed of silicon carbide crystals | - |
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| carboxyl | (adjective) relating to or containing the carboxyl group or carboxyl radical | Synonyms: carboxylic |
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| (noun) the univalent radical -COOH; present in and characteristic of organic acids | Synonyms: carboxyl group |
| carboxylate | (verb) treat (a chemical compound) with carboxyl or carboxylic acid | - |
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| carboxylic | (adjective) relating to or containing the carboxyl group or carboxyl radical | Synonyms: carboxyl |
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| carboy | (noun) a large bottle for holding corrosive liquids; usually cushioned in a special container | - |
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| chlorofluorocarbon | (noun) a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans | Synonyms: CFC |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| collarbone | (noun) bone linking the scapula and sternum | Synonyms: clavicle |
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| decarbonate | (verb) remove carbon dioxide from | - |
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| decarbonise | (verb) remove carbon from (an engine) | Synonyms: decarbonize, decarburise, decarburize, decoke |
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| decarbonize | (verb) remove carbon from (an engine) | Synonyms: decarbonise, decarburise, decarburize, decoke |
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| decarboxylase | (noun) any of the enzymes that hydrolize the carboxyl group | - |
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| decarboxylate | (verb) lose a carboxyl group | - |
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| (verb) remove a carboxyl group from (a chemical compound) | - |
| decarboxylation | (noun) the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen) | - |
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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| fluorocarbon | (noun) a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols | - |
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| garboard | (noun) the first wale laid next to the keel of a wooden ship | Synonyms: garboard plank, garboard strake |
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| garboil | (noun) a state of commotion and noise and confusion | Synonyms: tumult, tumultuousness, uproar |
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| garbology | (noun) the study of a society by analyzing its garbage | - |
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| gearbox | (noun) the shell (metal casing) in which a train of gears is sealed | Synonyms: gear box, gear case |
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| halocarbon | (noun) one of various compounds of carbon and any of the halogens | - |
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| harbor | (noun) a place of refuge and comfort and security | Synonyms: harbour |
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| (noun) a sheltered port where ships can take on or discharge cargo | Synonyms: harbour, haven, seaport |
| (verb) maintain (a theory, thoughts, or feelings) | Synonyms: bear, entertain, harbour, hold, nurse |
| (verb) hold back a thought or feeling about | Synonyms: harbour, shield |
| (verb) keep in one's possession; of animals | Synonyms: harbour |
| (verb) secretly shelter (as of fugitives or criminals) | Synonyms: harbour |
| harborage | (noun) (nautical) a place of refuge (as for a ship) | Synonyms: harbourage |
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| harbour | (noun) a place of refuge and comfort and security | Synonyms: harbor |
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| (noun) a sheltered port where ships can take on or discharge cargo | Synonyms: harbor, haven, seaport |
| (verb) maintain (a theory, thoughts, or feelings) | Synonyms: bear, entertain, harbor, hold, nurse |
| (verb) hold back a thought or feeling about | Synonyms: harbor, shield |
| (verb) keep in one's possession; of animals | Synonyms: harbor |
| (verb) secretly shelter (as of fugitives or criminals) | Synonyms: harbor |
| harbourage | (noun) (nautical) a place of refuge (as for a ship) | Synonyms: harborage |
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| hydrocarbon | (noun) an organic compound containing only carbon and hydrogen | - |
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| hydrochlorofluorocarbon | (noun) a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere | Synonyms: HCFC |
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| hydrofluorocarbon | (noun) a fluorocarbon emitted as a by-product of industrial manufacturing | Synonyms: HFC |
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| isocarboxazid | (noun) a monoamine oxidase inhibitor (trade name Marplan) that is used to treat clinical depression | Synonyms: Marplan |
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| larboard | (adjective) located on the left side of a ship or aircraft | Synonyms: port |
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| (noun) the left side of a ship or aircraft to someone who is aboard and facing the bow or nose | Synonyms: port |
| monocarboxylic | (adjective) containing one carboxyl group | - |
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| mortarboard | (noun) an academic cap with a flat square with a tassel on top | - |
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| (noun) a square board with a handle underneath; used by masons to hold or carry mortar | Synonyms: hawk |
| nonarboreal | (adjective) not inhabiting or frequenting trees | - |
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| noncarbonated | (adjective) not having carbonation | Synonyms: uncarbonated |
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| parboil | (verb) cook (vegetables) briefly | Synonyms: blanch |
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| perfluorocarbon | (noun) a powerful greenhouse gas emitted during the production of aluminum | Synonyms: PFC |
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| radiocarbon | (noun) a radioactive isotope of carbon | Synonyms: carbon 14 |
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| starboard | (adjective) located on the right side of a ship or aircraft | - |
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| (noun) the right side of a ship or aircraft to someone who is aboard and facing the bow or nose | - |
| (verb) turn to the right, of helms or rudders | - |
| tarboosh | (noun) a felt cap (usually red) for a man; shaped like a flat-topped cone with a tassel that hangs from the crown | Synonyms: fez |
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| uncarbonated | (adjective) not having carbonation | Synonyms: noncarbonated |
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| yearbook | (noun) a reference book that is published regularly once every year | Synonyms: annual, yearly |
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| (noun) a book published annually by the graduating class of a high school or college usually containing photographs of faculty and graduating students | - |