Peculiar

From Latin peculiaris ("one's own"), from Latin peculium ("private property"), from Latin pecus ("cattle").

Funk, W. J., Word origins and their romantic stories, New York, Wilfred Funk, Inc.

Full definition of peculiar

Out of the ordinary; odd; curious; unusual.The sky had a peculiar appearance before the storm.It would be rather peculiar to see a kangaroo hopping down a city street.

1800, The Church of Jesus Christ of Latter-day Saints, , Volume 41, page 379,I saw nothing peculiar in his conduct, and thought that his arrangement of the ballot box was perfect.
2001, Jack Schaefer, Wendell Minor, Shane,"Wasn't it peculiar," I heard mother say, "How he wouldn't talk about himself?""Peculiar?" said father. "Well, yes, in a way.""Everything about him is peculiar." Mother sounded as if she was stirred up and interested. "I never saw a man quite like him before."
2008, Stephen Arnott, Peculiar Proverbs: Weird Words of Wisdom from Around the World.

Common or usual for a certain place or circumstance; specific or particular.Kangaroos are peculiar to Australia.

1855, Immanuel Kant, John Miller Dow Meiklejohn (translator), , Volume 1, Division 2, per 1781, Immanuel Kant, '',This philosopher found his ideas especially in all that is practical,²⁹ that is, which rests upon freedom, which in its turn ranks under cognitions that are the peculiar product of reason.
1863, w, S:Collected Essays (Huxley)/Volume II/Chapter XI, As soon as that operation has taken place, the food is passed down to the stomach, and there it is mixed with the chemical fluid called the gastric juice, a substance which has the peculiar property of making soluble and dissolving out the nutritious matter in the grass, and leaving behind those parts which are not nutritious;
1895, Alfred Russel Wallace, , XX: Anomalous Islands: Celebes,But of late years extensive Tertiary deposits of Miocene age have been discovered, showing that it is not a mere congeries of volcanoes; it Iceland is connected with the British Islands and with Greenland by seas less than 500 fathoms deep; and it possesses a few mammalia, one of which is peculiar, and at least three peculiar species of birds.

(dated) One's own; belonging solely or especially to an individual; not shared or possessed by others.

(out of the ordinary) common, usual
(common or usual in a particular place or circumstance) common, general, universal

(plural peculiars)

That which is peculiar; a sole or exclusive property; a prerogative; a characteristic.

(UK, canon law) A particular parish or church which is exempt from the jurisdiction of the ordinary.