barbule

"The adjacent room to the classroom was used for storage. "

"The bird used its delicate feathers to steer through the air. "

"The face of the cliff had many projections that were big enough for birds to nest on."

"You can create the color orange by mixing yellow and red."

"The microscopic barbules on the feather interlock, creating a smooth, continuous surface. "

"The smooth surface of the kitchen table was perfect for setting the dinner plates. "

"My son's fringe covered his eyes, making it hard for him to see the whiteboard. "

"The bird's secondary feathers are essential for its flight. "

"The smooth transition between classes made it easy to get to my next lesson. "

"He helped his grandfather cook breakfast."

"The washing machine has an interlock that prevents the door from being opened while the drum is spinning. "

"The school is located just outside the town, without the main shopping area. "