This is the 17906th most frequent Russian word.
уточненок
It is a diminutive form referring to a "little duckling."
In this sentence, 'уточёнок' refers to a literal small duck, emphasizing a comparison to someone or something's appearance.
Он мило улыбнулся, похожий на уточёнка.
He smiled sweetly, resembling a duckling.
Here, 'уточнёнок' is used metaphorically to denote something small and nuanced, contributing to the larger context.
Эта деталь – уточнёнок в нашем плане.
This detail is a refinement in our plan.
In this sentence, 'уточёнок' explicitly refers to a small, toy representation of a duck, perhaps in a child's play context.