| LEPTOCEPHALOUS | • leptocephalous adj. Relating to a leptocephalus. • LEPTOCEPHALOUS adj. having a narrow skull, also LEPTOCEPHALIC. |
| MERCAPTOPURINE | • mercaptopurine n. (Pharmacology) An thiol antimetabolite C5H4N4S that interferes especially with the metabolism of purine… • MERCAPTOPURINE n. an antimetabolite sometimes used in the treatment of acute leukemia. |
| PERPETUALITIES | • PERPETUALITY n. the state of being perpetual. |
| PNEUMATOPHORES | • pneumatophores n. Plural of pneumatophore. • PNEUMATOPHORE n. an upward-growing respiratory root in swamp plants. |
| PROPAEDEUTICAL | • propaedeutical adj. Alternative form of propaedeutic. • PROPAEDEUTICAL adj. of or like a propaedeutic, a preliminary study. |
| PSEUDOPREGNANT | • pseudopregnant adj. Of, pertaining to, or undergoing pseudopregnancy. • PSEUDOPREGNANT adj. relating to pseudopregnancy. |
| SUPERPARTICLES | • superparticles n. Plural of superparticle. • SUPERPARTICLE n. a particle postulated in supersymmetry theory. |
| SUPERPHOSPHATE | • superphosphate n. A fertilizer produced by the action of concentrated sulfuric acid on powdered phosphate rock. • superphosphate n. A phosphate containing the greatest amount of phosphoric acid that can combine with the base. • SUPERPHOSPHATE n. acid phosphate. |
| SUPERSPECTACLE | • superspectacle n. A particularly grand and impressive spectacle. • SUPERSPECTACLE n. an exceptional spectacle. |
| SUPPLEMENTALLY | • supplementally adv. In a supplemental manner. • SUPPLEMENTAL adv. serving to supplement. |
| UNAPPRECIATIVE | • unappreciative adj. Not appreciative. • UNAPPRECIATIVE adj. not appreciative. |
| UNDERPOPULATED | • underpopulated adj. Having an insufficient population for economic viability. • UNDERPOPULATED adj. having a lower density of population than is normal or desirable. |
| UNDERSTRAPPERS | • understrappers n. Plural of understrapper. • UNDERSTRAPPER n. an inferior agent; an underling. |