Use Library of Congress Classification:
QH: Natural history - Biology
QK: Botany
QL: Zoology
QM: Human anatomy
QP: Physiology
QR: Microbiology
Facts on File dictionary of biology / edited by Robert Hine (QH302.5 .F38 1999)
Elsevier's dictionary of biology / compiled by Rauno Tirri ... [et al.] (QH302.5 .E47 1998)
Concise encyclopedia biology / translated and revised by Thomas A. Scott (QH302.5 .A2313 1996)
Henderson's dictionary of biological terms / Sandra Holmes (QH302.5 .H65 1986)
Penguin dictionary of biology / M. Abercrombie, C. J. Hickman, and M. L. Johnson (QH13 .A25 1980)
Encyclopedia of the biological sciences (QH13 .G7 1970)
Dictionary of the biological sciences (QH13 .G68)
Biologist's handbook of pronunciations. Illus. by Morris Van Dame and the author (QH13 .J3 1960)