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Genus (/ˈdʒiːnəs/; pl.: genera /ˈdʒɛnərə/) is a taxonomic rank above species and below family as used in the biological classification of living and fossil...

Chinchilla refers to either of two species (Chinchilla chinchilla and Chinchilla lanigera) of crepuscular rodents of the parvorder Caviomorpha, and are...

Arachnids are arthropods in the class Arachnida (/əˈræknɪdə/) of the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks...

Family (Latin: familia, pl.: familiae) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and...

An airplane (North American English), an aeroplane (British English), often shortened to plane, is a fixed-wing aircraft that is propelled forward by thrust...

In biology, taxonomic rank (which some authors prefer to call nomenclatural rank because ranking is part of nomenclature rather than taxonomy proper, according...

Deuterostomes (from Greek: lit. 'second mouth') are bilaterian animals of the superphylum Deuterostomia (/ˌdjuːtərəˈstoʊmi.ə/), typically characterized...

The subphylum Hexapoda (from Greek for 'six legs') or hexapods comprises the largest clade of arthropods and includes most of the extant arthropod species...

In zoological nomenclature, a type species (species typica) is the species name with which the name of a genus or subgenus is considered to be permanently...

The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his Catalogue des Nébuleuses et des Amas...

Digitalis (/ˌdɪdʒɪˈteɪlɪs/ or /ˌdɪdʒɪˈtælɪs/) is a genus of about 20 species of herbaceous perennial plants, shrubs, and biennials, commonly called foxgloves...

The McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas. The DC-10 was intended to succeed the DC-8 for...

The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to...

Right ascension (abbreviated RA; symbol α) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at...

Pancrustacea is the clade that comprises all crustaceans and all hexapods (insects and relatives). This grouping is contrary to the Atelocerata hypothesis...

Nepeta cataria, commonly known as catnip and catmint, is a species of the genus Nepeta in the mint family, native to southern and eastern Europe, the Middle...

A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used...

In biochemistry, the Lineweaver–Burk plot (or double reciprocal plot) is a graphical representation of the Michaelis–Menten equation of enzyme kinetics...

Salvia (/ˈsælviə/) is the largest genus of plants in the sage family Lamiaceae, with just under 1,000 species of shrubs, herbaceous perennials, and annuals...

In mammals, invertebrates and most fish, the anus (pl.: anuses or ani; from Latin, 'ring' or 'circle') is the external body orifice at the exit end of...