Noun
ostrog (plural ostrogs)
A small Russian fort, typically wooden, encircled by a palisade wall.
In 1736, Okhotsk was moved two miles downstream to a spit of land at the mouth of the Okhota, converting the ostrog into a proper port. Source: Internet
A waypoint named Verkhotomsky ostrog was established nearby in 1657 on a road from Tomsk to Kuznetsk fortress. Source: Internet
In 1661, Yakov Pokhabov built an ostrog nearby. citation The ostrog gained official town rights from the government in 1686. Source: Internet
Returning north to the Icha, he sent a party of men over the mountains to build an ostrog at Verkhnekamchatsk on the upper Kamchatka. Source: Internet