| MEGACEPHALY | • megacephaly n. Macrencephaly. • MEGACEPHALY n. the condition of having an unusually large head or cranial capacity, also MEGALOCEPHALY. |
| MEGAGAMETES | • megagametes n. Plural of megagamete. • MEGAGAMETE n. the larger and usually female gamete of a heterogamous organism, also MACROGAMETE. |
| MEGAGAUSSES | • MEGAGAUSS n. a unit of magnetic force, a million gauss. |
| MEGAHERTZES | • megahertzes n. Plural of megahertz. • MEGAHERTZ n. a measure of frequency, a million hertz. |
| MEGALOBLAST | • megaloblast n. An abnormally large red blood cell associated with pernicious anemia and with folic acid deficiency. • MEGALOBLAST n. a large erythroblast that appears in the blood esp. in pernicious anemia. |
| MEGALOMANIA | • megalomania n. A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence. • megalomania n. (Obsolete) Narcissistic personality disorder. • megalomania n. An obsession with grandiose or extravagant things or actions. |
| MEGALOMANIC | • megalomanic adj. Afflicted by megalomania. • MEGALOMANIC adj. relating to megalomania, also MEGALOMANIACAL. |
| MEGALOPOLIS | • megalopolis n. A large conurbation, where two or more large cities have sprawled outward to meet, forming something… • Megalopolis prop.n. Dated form of Megalopoli. • MEGALOPOLIS n. a wide-spreading, thickly-populated urban area. |
| MEGALOSAURI | • MEGALOSAURUS n. a large dinosaur, also MEGALOSAUR, MEGALOSAURIAN. |
| MEGALOSAURS | • megalosaurs n. Plural of megalosaur. • MEGALOSAUR n. a large dinosaur, also MEGALOSAURIAN, MEGALOSAURUS. |
| MEGAMERGERS | • megamergers n. Plural of megamerger. |
| MEGANEWTONS | • meganewtons n. Plural of meganewton. • MEGANEWTON n. a measure of gravity, a million newtons. |
| MEGAPARSECS | • megaparsecs n. Plural of megaparsec. • MEGAPARSEC n. a measure of astronomical distance, a million parsecs. |
| MEGAPHONING | • megaphoning v. Present participle of megaphone. • MEGAPHONE v. to magnify sound. |
| MEGAPROJECT | • megaproject n. A very large public investment project, especially one costing more than one billion US dollars. • MEGAPROJECT n. a major project or undertaking. |
| MEGASTARDOM | • megastardom n. The state of someone acknowledged as a megastar. |
| MEGATHERIAN | • megatherian adj. Relating to, or characteristic of a megatherium. • MEGATHERIAN adj. like a megathere, any of various gigantic extinct American sloths. |
| MEGATONNAGE | • megatonnage n. The destructive power of an explosive, measured in megatons. • MEGATONNAGE n. the total explosive capacity in megatons. |
| MEGAVITAMIN | • megavitamin adj. Involving megadoses of vitamins. • MEGAVITAMIN n. relating to or consisting of very large doses of vitamins. |