The phrase "a small indistinct" is correct and usable in written English.
It can be used to describe something that is both small in size and not clearly defined or easily recognizable.
Example: "In the distance, there was a small indistinct shape moving along the horizon."
Alternatives: "a tiny vague" or "a little unclear".
Adult male: Entire head (including the throat) is bright red; sometimes there is a small, indistinct grayish brown spot on the auriculars.
Phialides attached singly to subtending hyphae, 20 37.5 -42) × 1.5 2 μm, robust in appearance, mostly straight, subcylindrical, tapering towards the apex up to 0.5 1 μm, with a small, indistinct, collarette.
A chest X-ray showed a small indistinct opacity in the right lung base.
"When I taught in high school, whenever we taught slavery we would just have a few small, indistinct images of black people working on a sugar plantation," he said.
A furnace seems to be spinning in the midst of black clouds filling the sky and small indistinct characters move about in an end-of-the world atmosphere.
NBL consists of neuroblasts, which are immature, undifferentiated small, round-shaped sympathetic cells, with little cytoplasm, dark nuclei and small indistinct nucleoli.
Concentration may wane; content may be complex and often boring; print may be small, indistinct and dense, and many people have diagnosed or undiagnosed literacy issues; and studying often has to be carried out under suboptimal circumstances such as when tired, in poor lighting or when stressed.
A dense breast is seen, with a small irregular lesion, indistinct margins in the central right breast (dotted line).
All are small to moderately sized snakes with smooth glossy scales and a small head that is indistinct from the neck.
Male Amazonian Grosbeak is primarily dark, blackish blue; the forecrown, an indistinct supercilium, and a small shoulder patch are brighter blue.
At first glance the modest living room with parquet floor and track lighting resembles any space with an indifferent housekeeper: papers abound, stacks of paintings lean against walls, an indistinct jumble of items swallows a small table.
