There are very many countries which use pennies as their minor currency unit - including the US where it is nominally a cent - not a penny! The volume of one billion UK pennies, assuming that they were smooth cylindrical shapes, is approx 534.030 kilolitres.
cylindrical.
A kaleidoscope.
Do you mean, what shape is a rod? Because that answer is 'Cylindrical' or 'a cylinder' but if you want to know what is also cylindrical, your answer is penis.
Not all are, some are square
A glass.
The cylindrical barrel floated down the stream.
the negative pole of cylindrical batteries is the smooth end.
The word in Calibre
Smooth cylindrical type
To smooth is a verb, smooth is an adjective.
smoother is comparative of word smooth.
Yes, the word smooth is a noun, a word for the smooth part. Example use: The smooth and the rough, this razor can handle any beard. The word smooth is also an adjective (smooth, smoother, smoothest), and a verb (smooth, smooths, smoothing, smoothed).
These boobies are smooth
The opposite of smooth is rough.
The word is spelled smooth, just as you spelled it.
That'd be "smooth" lol