Focus on visualizing the round, often tiny, shape of the substance when using 'globule'. After stirring, the globules of oil gathered on the surface of the water.
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Material State
'Globule' implies a semi-liquid to viscous state of the substance, not solid or fully liquid. Melted chocolate formed into small globules on the parchment.
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Tiny Size
While 'globule' suggests smallness, sizes can vary, but are usually visible to the naked eye. Globules of mercury scattered on the floor from the broken thermometer.