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.
A person with a unique and interesting personality or creative talent.
A ridgeling.
An object or other creation (e.g. narrative work) from which all later copies and variations are derived.
A newly designed garment released by a fashion designer as part of a collection.
Pioneering.
First in a series of copies or versions.
Having a specified place or time as its origin.
Fresh, different.
Newly created.
Relating to the origin or beginning; preceding all others.