microbubble

[ mahy-kroh-buhb-uh l ]
/ ˈmaɪ kroʊˌbʌb əl /

noun

a microscopic, gas-filled bubble, used especially in medicine to image blood flow, dissolve blood clots, etc.

British Dictionary definitions for microbubbles

microbubbles
/ (ˈmaɪkrəʊˌbʌbəlz) /

pl n

med a contrast medium used with ultrasound, consisting of tiny bubbles of gas introduced into the vascular system or Fallopian tubes to enhance the images obtained