The burrow-ducks had a big knob on the base of the bill, which spoiled their appearance.
A minute later he started the source lamp, rotating the intensity knob to full power.
Adjust the wavelength control knob,while monitoring the digital display for a maximum absorbance reading.
Alexandr Vladimirovitch Korolyov, the dear fellow, sat in a corner sucking the knob of his cane, and only shook his head.
Beneath the knobs for lights and wipers the octagon of the ignition key tells in silhouette.
He had only one suit - a frowzy, blue, double-breasted chalk-stripe now hanging on the knob of the lavatory door.
He turned the knob and pulled but it wouldn't budge.
Locking is carried out by light moving of the lock knob in the direction that is opposite to unlatching.
Press the chosen burner control knob and turn it anticlockwise to the maximum power setting.
She had pushed the clutch in, and her right hand was on the shifter-knob.
a circular rounded projection or protuberance: knobble, nailhead, projection, boss
a round handle: grip, handgrip, handle, doorhandle, stop, doorknob, hold
an ornament in the shape of a ball on the hilt of a sword or dagger: ornament, hilt, decoration, pommel, ornamentation
any thickened enlargement: node, convex shape, convexity, thickening