glasstube
nounUK /ˈɡlɑːs.tjuːb/
US /ˈɡlæs.tuːb/
A glasstube is a long, hollow tube made of glass.
The scientist used a glasstube to hold the blue liquid.
OTHER MEANINGS
2. A small glass container shaped like a tube, often used in labs.
She sealed the sample inside a glasstube.
3. A glass part of a lamp or device that looks like a tube.
The old radio's glasstube glowed faintly.
4. A decorative glass tube used in crafts or ornaments.
He hung a colorful glasstube in the window.