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grylloblattodea
Science; General science
A relatively new order of flightless insects first described from Sulphur Mountain near Banff, Canada, in 1914 by entomologist E. M. Walker. There are now 26 described species of ...
alismatidae
Science; General science
A relatively primitive subclass of the class Liliopsida (monocotyledons) of the division Magnoliophyta (Angiospermae), the flowering plants, consisting of 4 orders, 16 families, ...
cadmium
Science; General science
A relatively rare chemical element, symbol Cd, atomic number 48, closely related to zinc, with which it is usually associated in nature. It is a silvery-white ductile metal with a ...
haemosporina
Science; General science
A relatively small and generally rather compact group of protozoa in the subphylum Sporozoa. Authorities differ as to the group's taxonomic status; that assigned it by the ...
satellite (astronomy)
Science; General science
A relatively small body orbiting a larger one that in turn orbits a star. In the solar system, all of the planets except Mercury and Venus have satellites. Well over 100 planetary ...
astrapotheria
Science; General science
A relatively small group of extinct South American ungulates, ranging from the late Paleocene to the late Miocene. They are customarily divided into two suborders: the late ...
caryophyllidae
Science; General science
A relatively small subclass of the class Magnoliopsida (dicotyledons) of the division Magnoliophyta (Angiospermae), the flowering plants, consisting of 3 orders, 14 families, and ...
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