What does the prefix DIA- indicate in medical terminology?

What does the prefix DIA- indicate in medical terminology?

• A. Through
• B. Around
• C. Across
• D. Beyond

Answer: (A)

DIA- signals movement through or across, coming from Greek meaning through. In medical terms this prefix soaks into many words that describe passing through or penetrating something, or going through a process. For example, diagnosis describes determining a disease by working through information and symptoms, and diathermy refers to heat that penetrates tissue. Because the everyday, core sense of DIA- in clinical language is “through,” that is the best fit among the options. (Note: in some words you might see an “across” sense, like diameter, but the usual, general sense used in medical terminology is through.)

DIA- signals movement through or across, coming from Greek meaning through. In medical terms this prefix soaks into many words that describe passing through or penetrating something, or going through a process. For example, diagnosis describes determining a disease by working through information and symptoms, and diathermy refers to heat that penetrates tissue. Because the everyday, core sense of DIA- in clinical language is “through,” that is the best fit among the options. (Note: in some words you might see an “across” sense, like diameter, but the usual, general sense used in medical terminology is through.)