12-Letter Words Containing: O,S,T,R,A,C,O,D

• an adventurer (especially one who led the Spanish conquest of Mexico and Peru in the 16th century)

• the branch of medical science concerned with disorders or deformities of the spine and joints

• cause of trichomoniasis in women and cattle and birds

• primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva

• a musician who plays the accordion

• of or relating to study or research that is done after work for the doctoral degree has been completed

• a grant that funds postdoctoral study or research

• extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic