gemellology n. the study of twins and the phenomenon of twi...
fistula n. an abnormal passageway between two internal orga...
AH abbreviation for alternative hypothesis.
Werdnig–Hoffmann disease see spinal muscular atrophy. [Guid...
utilization deficiency the inability of individuals to impr...
photopigment n. a substance in a retinal rod or retinal con...