英语词源字典 - 在线词源网站

Helicobacter [Helicobacter 词源字典]: "A genus of Gram-negative, microaerophilic bacteria with helical, curved, or straight cells, isolated chiefly from the digestive tract of mammals; (also helicobacter) a bacterium of this genus, especially Helicobacter pylori, which causes chronic gastritis and peptic ulcer disease in humans", 1980s. From scientific Latin Helicobacter, genus name from ancient Greek ἑλικο- + -bacter.[Helicobacter etymology, Helicobacter origin, 英语词源]
hypermetropia: "Long-sightedness", Mid 19th century: from Greek hupermetros 'beyond measure' (from huper 'over, above' + metron 'measure') + ōps 'eye'.
hyoscine: "A poisonous plant alkaloid used as an anti-emetic in motion sickness and as a preoperative medication for examination of the eye", Late 19th century: from modern Latin hyoscyamus (see hyoscyamine) + -ine⁴.
heptarchy: "A state or region consisting of seven autonomous regions", Late 16th century: from hepta- 'seven' + Greek arkhia 'rule', on the pattern of tetrarchy.
Hemiptera: "A large order of insects that comprises the true bugs, which include aphids, cicadas, leafhoppers, and many others. They have piercing and sucking mouthparts and incomplete metamorphosis", Modern Latin (plural), from Greek hēmi- 'half' + pteron 'wing' (because of the forewing structure, partly hardened at the base and partly membranous).
hypocoristic: "Denoting or of the nature of a pet name or diminutive form of a name", Mid 19th century: from Greek hupokorisma, from hupokorizesthai 'play the child', from hupo 'under' + korē 'child'.
hackathon: "An event, typically lasting several days, in which a large number of people meet to engage in collaborative computer programming", 1990s: from hack¹, on the pattern of marathon.
haemocyanin: "A protein containing copper, responsible for transporting oxygen in the blood plasma of arthropods and molluscs", Mid 19th century: from haemo- 'of blood' + cyan + -in¹.
hypochlorous acid: "A weak acid with oxidizing properties formed when chlorine dissolves in cold water and used in bleaching and water treatment", Mid 19th century: hypochlorous from hypo- (denoting an element in a low valency) + chlorine + -ous.
hyoscyamine: "A poisonous compound present in henbane, with similar properties to hyoscine", Mid 19th century: from modern Latin hyoscyamus (from Greek huoskuamos 'henbane', from hus, huos 'pig' + kuamos 'bean') + -ine⁴.
hypogastrium: "The part of the central abdomen which is situated below the region of the stomach", Late 17th century: modern Latin, from Greek hupogastrion, from hupo 'under' + gastēr 'belly'.
hyperaemia: "An excess of blood in the vessels supplying an organ or other part of the body", Mid 19th century: from hyper- 'above normal' + -aemia.
hemicrania: "Pain affecting one side of the head", Late Middle English: via late Latin from Greek hēmikrania, from hēmi- 'half' + kranion 'skull'.
hydathode: "A modified pore, especially on a leaf, which exudes drops of water", Late 19th century: from Greek hudōr, hudat- 'water' + hodos 'way'.
helianthus: "A plant of the genus Helianthus in the daisy family, especially (in gardening) a sunflower", Modern Latin, from Greek hēlios 'sun' + anthos 'flower'.
homocercal: "(Of a fish’s tail) appearing outwardly symmetrical but with the backbone passing into the upper lobe, as in all higher fish", Mid 19th century: from homo- 'same' + Greek kerkos 'tail' + -al.
histiocyte: "A stationary phagocytic cell present in connective tissue", Early 20th century: from Greek histion (diminutive of histos 'tissue, web') + -cyte.
haematemesis: "The vomiting of blood", Early 19th century: from haemato- 'of blood' + Greek emesis 'vomiting'.
hypersonic: "Relating to speeds of more than five times the speed of sound (Mach 5)", 1930s (in sense 2): from hyper- 'beyond, exceeding', on the pattern of supersonic and ultrasonic.
heptad: "A group or set of seven", Mid 17th century: from Greek heptas, heptad-, from hepta 'seven'.