blob
n. countablen. a small, soft, or shapeless mass of something liquid or sticky. You might see a blob of paint on a table or a blob of jam on your toast.
n. a small, indistinct, or shapeless mass of a substance, typically one that is viscous or liquid. Often used to describe objects that lack a defined outline or structure.
A large blob of blue paint fell onto the white carpet.
The satellite image showed a mysterious green blob moving slowly across the surface of the ocean.
In the early stages of the experiment, the cells appeared as a singular, undifferentiated blob under the microscope before they began to specialize and form distinct structures.
From Middle English *blob (“attested in blobby”). Possibly onomatopoeic, similarly to bleb and blubber.
Commonly followed by the preposition 'of' to specify the substance.