Word origins

• German irisIris × germanica, a nothospecies of iris.
• giant isopodAny of several very large marine isopods of the genus Bathynomus, known for being the largest of all known isopods.
• giganotosaurusAny of several very large, carnivorous dinosaurs of the subfamily Giganotosaurinae, from the Cretaceous period.
• ginglymodianAny fish of the clade Ginglymodi.
• ginkgophytanAny plant of the division Ginkgophyta
• giraffidAn animal of the family Giraffidae (such as giraffes (Giraffa spp.) and okapis (Okapia johnstoni)).
• glomeridAny millipede in the family Glomeridae.
• gnateaterAny of the South and Central American passerine birds in the family Conopophagidae.
• gnathostomeAny vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish, in contrast with the Agnatha
• gnetalAny species of the order Gnetales of relict gymnosperms.
• godetiaAny of several flowering plants of the taxonomic section of Clarkia, Clarkia sect. Godetia.
• golden-billed saltatorSaltator aurantiirostris, a species of cardinalid bird found in parts of South America.
• golden staphA bacterium, often found on the skin and nose, that commonly causes staph infections, technically known as Staphylococcus aureus.
• goodeniaAny flowering plant of the genus Goodenia.
• graphiumA stylus (for writing).
• green monardellaMonardella viridis, a species of plant in the mint subfamily.
• gryphaeaAny of the genus †Gryphaea of extinct gryphaeid oysters, devil's toenails.
• gymnophionanAny amphibian of the order Gymnophiona; a caecilian.
• gymnotusAny of the genus Gymnotus of electric knifefishes.
• gyrinidAny beetle in the family Gyrinidae, a whirligig beetle.
• haemodoraceousOf or relating to the family Haemodoraceae (bloodworts).
• halacaridAny member of the Halacaridae family of mites.
• halichondrinAny of a family of macrocyclic polyethers initially isolated from sponges of the genus Halichondria
• halictidAny member of the family Halictidae, many of which are known as sweat bees.
• halogetonAny plant of the genus Halogeton in the family Amaranthaceae.
• haptophyteA kind of unicellular marine phytoplankton, typically covered in tiny scales or plates composed of carbohydrates and calcium deposits
• harpalineBelonging to the taxonomic subfamily Harpalinae.
• Hartmann's mountain zebraA mountain zebra of subspecies Equus zebra hartmannae, found in southwestern Angola and western Namibia, and having a dewlap and an unstriped belly.
• hatteriaThe tuatara.
• helichrysinA yellow pigment in several species of Helichrysum.
• heliettinA furocoumarin with IUPAC name (±)-3-(1,1-dimethylallyl)-6,7-dihydro-7-(1-hydroxy-1-methylethyl)-2H-furo-[2,3-g]-1-benzopyran-2-one.
• heliornithidAny finfoot in the family Heliornithidae.
• helmet orchidAny of various orchids with helmet-shaped flowers, of genera Coryanthes, Corybas, Cranichis, Nematoceras, and Pterostylis.
• henodontidAny of the family †Henodontidae of extinct placodonts.
• hesperornithidAny extinct avialan in the family Hesperornithidae.
• heteroneuranAny butterfly or moth in the infraorder Heteroneura.
• heteropteranAny of very many insects of the suborder Heteroptera
• Hetero sapiensCollectively, straight people.
• heterotardigradeAny tardigrade or similar animal of the class Heterotardigrada
• hibbertiaAny of the typically yellow-flowered shrubs in the genus Hibbertia, family Dilleniaceae.
• holmiidAny member of the family †Holmiidae of trilobites.
• holocalinA cyanogenic glucoside found in the seeds of Holocalyx balansae.
• holodontidAny extinct lungfish of the family †Holodontidae.
• homininAny member of the taxonomic tribe Hominini, the evolutionary group that includes modern humans and now-extinct bipedal relatives.
• horse chestnutAny of several tree species of genus Aesculus, especially Aesculus hippocastanum, common in temperate northern hemisphere.
• hungarovirusAny virus of the former genus Hungarovirus (now Hunnivirus)
• huratoxinA poisonous diterpene found in trees of genus Hura.
• Hutton's vireoVireo huttoni, a small songbird found from southern British Columbia in Canada to central Guatemala in Central America.
• hydrozoonhydrozoan
• hymenopteristAn entomologist who studies hymenopterans.
• hynobiidAny member of the family Hynobiidae of salamanders.
• hyperhexapodAny arthropod, of the division Hyperhexapoda, that has more than six legs
• hyperoliidAny in the family Hyperoliidae of frogs.
• hyperoodonA whale in the genus Hyperoodon of the order Cetacea, comprising both species of bottlenose whale.
• hypsilophodontAny of the genus †Hypsilophodon of small ornithopod herbivorous dinosaurs.
• ichneumonidAny wasp of the family Ichneumonidae.
• ichneumonoidAny wasp of the superfamily Ichneumonoidea.
• ichthyosaurAny fishlike marine reptiles of the extinct order †Ichthyosauria of the early Triassic to the late Cretaceous period, that had a body somewhat like a porpoise.
• ichthyosaurusAny members of the genus Ichthyosaurus.
• idunaAny warbler of the genus Iduna.
• infantaricinAny of a group of bacteriocins produced by a strain of Streptococcus infantarius
• inovirusAny of the genus Inovirus of filamentous bacteriophages.
• insularineAn amorphous alkaloid found in Cyclea insularis.
• ipomoeinA glucoside obtained from Ipomoea pandurata.
• iresineAny of the genus Iresine of flowering plants in the amaranth family.
• islandicinA trihydroxyanthraquinone found in Talaromyces islandicus.
• isoetidA rosette plant that completes its entire life cycle submerged.
• isosporiasisinfection by parasites of the genus Isospora.
• issidAny of the planthoppers in the family Issidae.
• ixodeA member of the genus Ixodes of ticks.
• ixodidAny of various ticks of the family Ixodidae.
• jaborosalactolA naturally-occurring sterol used to treat some rare cancers
• japaluraAny lizard of the genus Japalura.
• jararacussinA fibrinogen-clotting enzyme in the venom of the pit viper Bothrops jararacussu
• jatrophaneAny of a group of diterpenes found in Jatropha and other species.
• jatrorrhizineA protoberberine alkaloid isolated from Enantia chlorantha of the custard apple family, and other species.
• juglandoidAny tree of the subfamily Juglandoideae.
• julocrotineA glutarimide alkaloid, N-[2,6-dioxo-1-(2-phenylethyl)-3-piperidinyl]-2-methylbutanamide, present in Julocroton montevidensis and Croton membranaceus.
• julodineAny beetle of the subfamily Julodinae (some of the jewel beetles).
• kalopanaxsaponinAny of a group of triterpenoid saponins present in trees of the genus Kalopanax.
• kamebaninAn antitumor ent-kaurenoid isolated from Isodon kameba.
• kiwaiformHaving the form of decapod crustaceans of the genus Kiwa or of the family Kiwaidae
• Kloss's gibbonA small black gibbon (Hylobates klossii), of the Mentawai Islands to the west of Sumatra.
• krameriaAny member of the genus Krameria of rhatanies.
• Krause's sedgeCarex krausei, a species of sedge.
• lacertidAny lizard of the family Lacertidae.
• lactucic acidAny of various acids derived from Lactuca virosa.
• lactuconeA white, crystalline, tasteless substance found in the milky sap of species of Lactuca, and constituting an essential ingredient of lactucarium.
• lagomorphA member of the mammalian taxonomic order Lagomorpha: a hare, a rabbit, or a pika.
• lambeosaurA crested duck-billed dinosaur of the family Hadrosauridae.
• lambliasisgiardiasis
• lamiidAny member of the family Lamiidae, now considered to be the cerambycid subfamily Lamiinae.
• lamiineAny longhorn beetle of the Lamiinae, a flat-faced longhorn.
• Lang-ExsterThe star α Tucanae in the constellation Tucana.
• langloisiaA flowering plant of the genus Langloisia
• larentiineAny moth in the geometrid subfamily Larentiinae.
• large-billed scrubwrenSericornis magnirostra, a species of scrubwren.
• lasiocampidAny member of the Lasiocampidae.
• laurasiatherianAny member of the Laurasiatheria.
• laurenciaAny red algae of the genus Laurencia.