Medical Prefixes that Describe the Size

The prefix micro- means "small". Example is the word micro/bi/o/logy. Micro- means "small", bi/o is a combining form that pertains to "life" and -logy is a suffix term that refers to "study of" or "specialization". The scientific study of microorganisms is known as microbiology.

The prefix macr(o)- means "large". Example is the word macr(o)/cyte. Macr(o)- means "large", -cyte is a suffix term that pertains to "cell". Macrocyte refers to an uncommonly large red blood cell that is linked with pernicious anemia.

The prefix mega(lo)- means "large". Example is the word mega(lo)/mania. Mega(lo)- means "large", -mania is a suffix term that pertains to "obsession" or "preoccupation". Megalomania is an obsession with power and money, and a love of big schemes.

The prefix iso- means "equal". Example is the word iso/metr/ic. Iso- means "equal", metr is a word root that refers to "measurement", and -ic is a suffix term that means "pertaining to". Isometric refers to having the same measurement; equal dimensions.

The prefix equi- means "equal". Example is the word equi/libra/tion. Equi- means "equal", libra is a word root that refers to "balance", and -tion is a suffix term that means "a process or state". The process of establishing or maintaining equilibrium is called equilibration.