15-Letter Words Containing: D,E,F,O,R,C,E

• A conference held by video link. An arranged video phone call between more than two parties.

• To hold a conference or meeting via a remote video link

• total certainty or greater certainty than circumstances warrant

• A device that uses diffraction (especially X-ray diffraction) to investigate the structure of matter.

• the gradual transformation of habitable land into desert; is usually caused by climate change or by destructive use of the land