斑 - spot, blemish, speck

unevenness (of colour, paint, etc.); irregularity; nonuniformity; blotchiness

purpura; purple spot

variegated streaks

postmortem lividity; livor mortis; death spot

purple spot (on a plant)

Anopheles (genus of mosquitoes)

spots; speckles; spotted pattern; mottled pattern

brindled ox; spotted cow

red spots; erythema

water spot (e.g. dried on a dish after washing)

monarch butterfly (Danaus plexippus)

blood spot