0 a circular decoration, especially a coloured circle on a military aircraft that shows its nationality
The circumferences of the top roundels are inconsistently done.
They know that simply putting up a roundel with a number on it does not achieve the desired effect.
Departmental policy is to authorise carriageway roundels only when used in conjunction with upright repeated signs.
There are severe penalties for breaking limits and drivers should know when they enter a new speed limit zone by passing a sign displaying a speed limit roundel.
The experiments to determine the effectiveness of painting speed limit roundels on the road surface, as a way of influencing driver choice of speed, are not yet complete.
Research has shown when used alone roundels have little effect on vehicle speeds and adverse weather conditions can render them invisible.
The small owl tucked away to the lower right of the large central roundel is also almost certainly perched atop another helmet.
The metrics used are usually of five or seven-syllable roundels, and in presentations, songs quite often are linked together, on a medley.