A distinguishing feature of a person or thing.
For a given field or ring, a natural number that is either the smallest positive number n such that n instances of the multiplicative identity (1) summed together yield the additive identity (0) or, if no such number exists, the number 0.
The integer part of a logarithm.
The distinguishing features of a navigational light on a lighthouse etc by which it can be identified (colour, pattern of flashes etc.).
Being a distinguishing feature of a person or thing.
An idiosyncrasy; a slight glitch, mannerism; something unusual about the manner or style of something or someone.
An acute angle dividing a molding; a groove that runs lengthwise between the upper part of a moulding and a soffit.
To (cause to) move with a wry jerk.
To furnish with a quirk or channel.