RI

large shrub of tropical Africa and Asia having large palmate leaves and spiny capsules containing seeds that are the source of castor oil and ricin

RI

a stack of hay

RI

a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)

RI

twist suddenly so as to sprain

RI

pile in ricks, as of hay

RI

the most decorated United States combat pilot in World War I (1890-1973)

RI

the quality of being unstable and insecure

RI

childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus

RI

mild infectious rickettsial disease caused by a bacterium of the genus Rickettsia transmitted to humans by the bite a mite that lives on rodents

RI

any of a group of parasitic bacteria that live in arthropods (as ticks and mites) and can cause disease if transmitted to human beings

RI

microorganism resembling bacteria inhabiting arthropod tissues but capable of causing disease in vertebrates

RI

relating to or caused by rickettsias