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Delaware Route 300 (DE 300) is an 11.83-mile-long (19.04 km) state highway in Kent County, Delaware. The route is a continuation of Maryland Route 300 (MD 300) from the Maryland border near Everetts Corner. It runs in a northeast direction from there to the town of Smyrna, where it ends at U.S. Route 13 (US 13) while concurrent with DE 6. The route is signed east-west. Along the way, DE 300 passes through rural areas of northern Kent County as well as the towns of Kenton and Clayton. The road intersects DE 44 at Everetts Corner, DE 11 southwest of Kenton, DE 42 in Kenton, DE 15 between Kenton and Clayton, and DE 6 in Smyrna. The road was first built as a state highway in the 1920s and 1930s between the Maryland border and Clayton, with the DE 300 designation given to the road by 1936. The route was extended to its current terminus in the 1950s.

Parachordodes is a genus of worms belonging to the family Chordodidae.

Sewickley is a borough in Allegheny County, Pennsylvania, United States, 12 miles (19 km) west northwest of Pittsburgh along the Ohio River. It is a residential suburb of the Pittsburgh metropolitan area. The population was 3,907 at the 2020 census. The Sewickley Bridge crosses the Ohio River from Sewickley to Moon Township.