dia-, di-

(Greek: through, thoroughly; across; entirely, utterly)

Advocatus diaboli. (Latin)
Translation: "Devil's advocate."

This term is generally used to describe someone who takes the unpopular or opposite side in an argument either out of contentiousness or out of a zeal for the truth.

angiodiascopy
Direct visual inspection of blood vessels of the extremities, a light being held behind the part.
angiodiathermy
1. The obliteration of blood vessels with diathermy.
2. The therapeutic generation of local heat in body tissues by high-frequency electromagnetic currents.
anosodiaphoria
Indifference to one’s own disease.
diabetes
diabetic
diabetic ulcer
A cutaneous ulcer associated with diabetes mellitus.
diabetophobia (s) (noun), diabetophobias (pl)
A dread of having diabetes: Carl started to have diabetophobia after his doctor examined him and commented on his body not producing enough of the hormone needed to turn sugar into the energy he needed for doing everyday activities.
diacaustic
1. Pertaining to, or possessing the properties of, a species of caustic curves formed by refraction.
2. A curved formed by the consecutive intersections of rays of light refracted through a lens.
3. That which burns by refraction, as a double convex lens, or the sun's rays concentrated by such a lens, sometimes used as a cautery.
diachronic
1. Lasting through time, or during an existing period.
2. In medicine, systematically observed over time in the same subjects throughout as opposed to synchronic or cross-sectional; the inferences are equivalent only where there is strict stability of all elements.
3. Pertaining to or designating a method of linguistic study concerned with the historical development of a language; historical, as opposed to descriptive or synchronic.
4. In archaeology, denoting actions or things which occur over time, as in the study of artifacts in a region as they change across sequential periods of time.
diachronism
1. The existence of a geological feature that transgresses palaeontological zones; for example, there is a great divergence between the lithological and chronological classification.
2. The existence within a single geologic formation of regions of rock that were laid down at different times; for example, by a sea that gradually covered a landmass.
3. In botany, having two periods of growth in the year.
diachronous
1. In geology, a rock unit, varying in age in different areas or cutting across time planes or biostratigraphic zones; time-transgressive.
2. Describing a lithological unit whose age varies from place to place, or a lithological unit (rock formation) which cuts across various times or biostratigraphic zones.
3. A geological deposit in which a sedimentary rock formation apparently consists of similar material, but varies in age from place to place.

For example, as a shoreline advances or retreats, a succession of continuous deposits representing different environments; such as, beach, shallow water, and deeper water, may be left behind as their ages vary depending on the positions of the shorelines through the various time sequences.

diacoustic (s) (noun), diacoustics (pl)
The science of spreading or bouncing sounds around: "Carson was an expert in diacoustics and was researching the qualities of surfaces that refracted or diverted sounds in different directions."
diacritic
diacritical
1. Serving to distinguish or able to distinguish; said of a mark or symbol to show pronunciation.
2. Indicating a change or modification in something; especially, in the way a printed letter is to be pronounced or stressed.
3. Capable of distinguishing, discerning, or showing a capacity for discerning.