halometer
noun
ha·lom·e·ter
ha-ˈläm-ət-ər 
: an instrument for measuring the average diameter of red blood cells by means of the halos produced around them by diffraction
Cite this Entry
“Halometer.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/halometer. Accessed 21 May. 2025.
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