n. letters used to represent the individual elements in a compound (*) chemical formula (*) acetominophen (*) proton (*) pesticide

n. an obstacle that prevents things from moving along (*) blockage (*) collagen (*) capillary (*) enthalpy

n. period of life encompassing childhood; adolescence and early adulthood before middle age; boy; young man (*) spirometer (*) youth (*) blastulation (*) blister

adj. relating to a molecule containing equal quantities of dextrorotatory and levorotatory forms and therefore not rotating the plane of incident polarized light (*) elastic (*) X-linked gene (*) racemic (*) dilute

n. a strong reason for believing a particular action needs to be taken (*) salt (*) dementia (*) oogenesis (*) indication

pref. low; under; below (*) hypo- (*) neph- (*) circum- (*) xeno-

n. a cut or break in the skin (*) myofibril (*) anemia (*) unsaturated fat (*) laceration

v. to break (*) expel (*) emulsify (*) fracture (*) dislocate

n. lymphoid tissue at the back of the throat (*) jerk (*) circadian rhythm (*) electrode (*) adenoids

n. yellow color of the skin due to high levels of bilirubin in the blood (*) allergen (*) jaundice (*) goiter (*) allele