I have always seen the idiopathic form preceded by premonitory symptoms, such as a peculiar expression of the countenance, stiffness of the muscles of the throat and of the jaw.
Eben was about to reply in an angry manner, when the form of his countenance instantly changed, and a peculiar expression, half-humorous, appeared in his eyes.
Then she detected a peculiar expression in his eyes, and at once surmised its meaning.
There was a peculiar expressionin Grimsby's eyes as he asked the question, which Donaster failed to notice.
The reply was so unexpected and sudden, that McKay could not avoid a slight start and a peculiar expression, in spite of his usual self-command.
When it was ready she looked up with a peculiar expression on her face, as she drew something from her pocket.
Her hair was curly and golden, but her eyes were dark like her mother's, and the lids drooped over them in that manner which gives a peculiar expression of dreamy wistfulness.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "peculiar expression" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.