- a prefix occurring in loanwords from Greek (diabetes; dialect) and used, in the formation of compound words, to mean “passing through” (diathermy), “thoroughly,” “completely” (diagnosis), “going apart” (dialysis), and “opposed in moment” (diamagnetism).
- diameter.
- through, throughout, or during
- across
- apart
- (in botany) at right angles
- in opposite or different directions
