Arcidae - ț̢
A family of ark shell mollusks, in the class BIVALVIA. They have soft bodies with platelike GILLS enclosed within two shells hinged together.
Synonyms : Ark Shells
Arcobacter - ț̢
A genus of gram-negative, aerotolerant, spiral-shaped bacteria isolated from water and associated with diarrhea in humans and animals.
Synonyms :
Arctic Regions - ț̢
The Arctic Ocean and the lands in it and adjacent to it. It includes Point Barrow, Alaska, most of the Franklin District in Canada, two thirds of Greenland, Svalbard, Franz Josef Land, Lapland, Novaya Zemlya, and Northern Siberia. (Webster's New Geographical Dictionary, 1988, p66)
Synonyms :
Arctium - ț̢
A plant genus of the family ASTERACEAE. Arctiin (LIGNANS) is in the seed.