Doppler ultrasound is a type of ultrasound that depends on the Doppler Effect, a change in the wave's frequency, which can occur from the motion of a reflector, such a red blood cell. We experience the Doppler Effect when, for example, an ambulance approaches us, passes and then drives away.
Definition of PLACODERM. : any of a class (Placodermi) of extinct chiefly Devonian fishes with an armor of bony plates and primitive jaw structures.ADVERTISEMENT. New Latin Placodermi, ultimately from GK plak-, plax + derma skin â more at derm-. any of a class (Placodermi) of extinct chiefly Devonian fishes with an armor of bony plates and primitive jaw structures. ADVERTISEMENT.
ATSEL (××¦×): Hebrew name meaning noble.. In the bible, this is the name of a place near Jerusalem, and a descendant of Saul. AVDON (×¢××ï­×): Variant form of Hebrew Abdown, meaning servant, worshiper.. In the bible, this is the name of several characters, including one of the judges who ruled over Israel.SALMOWN (×¦××ï­×): Hebrew name meaning shady.. In the bible, this is the name of one of king David's warriors. TSELOPHCHAD (×¦××¤××): Hebrew name meaning first rupture; fracture, taken to mean first-born.. In the bible, this is the name of a member of the tribe Manasseh.