plural of American white birch

(biology) A screening technique for the rapid detection of recombinant bacteria in vector-based molecular cloning experiments. DNA of interest is ligated into a vector, which is then inserted into a host cell; these are grown in the presence of X-gal. Cells transformed with vectors containing recombinant DNA will produce white colonies; cells transformed with non-recombinant plasmids (i.e. only the vector) grow into blue colonies.

The American rodent Peromyscus leucopus, a reservoir for Borrelia burgdorferi, the cause of Lyme disease.

plural of white-footed mouse

A local government district of Oxfordshire, England, named after the region. Originally a part of Berkshire.

The problem posed by ironic process theory, where (for example) explicitly trying not to think about a white bear makes one more likely to think of it.

The plant Gastrolobium velutinum.

Either of two dolphins of the genus Lagenorhynchus which have conspicuous white markings on the sides of the body: Lagenorhynchus acutus in the North Atlantic (the Atlantic white-sided dolphin), and Lagenorhynchus obliquidens in the North Pacific (the Pacific white-sided dolphin).

Lanioturdus torquatus, a passerine bird of western Angola and Namibia.

plural of white-tailed shrike