nitrogen a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
neutropenia leukopenia in which the decrease is primarily in number of neutrophils (the chief phagocytic leukocyte)
neutron a subatomic particle with zero charge
nitrogenase an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
nitrogenous of or relating to or containing nitrogen
goitrogen any substance that induces the formation of a goiter
neutrino an elementary particle with zero charge and zero mass
nitrogenize treat with nitrogen or a nitrogen compound
androgeny male parthenogenesis in which the embryo contains only paternal chromosomes due to the failure of the egg nucleus to participate in fertilization
nitrogenise treat with nitrogen or a nitrogen compound
estrogen a hormone responsible for female sex characteristics
androgen male sex hormone that is produced in the testes and responsible for typical male sexual characteristics
hydrogen a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
oestrogen a hormone responsible for female sex characteristics
tetragon a four-sided polygon
neutering the sterilization of an animal
Tetragonia New Zealand spinach
androgyny showing characteristics of both sexes
heterogeneous consisting of elements not of the same kind or nature
nutrition the organic process of nourishing or being nourished