speculum

"The examination of the patient's symptoms took several hours. "

"My grandma enjoys birdwatching in her backyard, where she can see many different types of birds. "

"The prison guard stood in the watchtower, scanning the yard for any signs of trouble. "

"The astronomer presented a fascinating talk about distant galaxies in our school's science club. "

"The violinist was a master of her instrument."

"My sister is very helpful, especially when it comes to organizing things. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The hummingbird's feathers were iridescent, shimmering with greens, blues, and purples as it hovered near the feeder. "

"Using the telescope, the student was able to observe the craters on the moon clearly. "

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

"The jeweler carefully examined the brilliant, admiring its dazzling sparkle. "

"After arguing with her parents, Sarah abandoned her plans for the weekend. "