Existing definitions Here is the list of the terminologies, and sometimes the associated definition. A $ is replaceable by a variable or an expression.

To create a new terminology, please respect the following rules:

the variables are replaced by the character '$' which is separated from the other terms by a space. Ex: '$ is null' or '$ is $ - periodic'.
the character '$' is therefore forbidden in the terminology (in an other aim as representing the position of a variable).
tabulation, carriage return and new line are forbidden in syntax definition.
the characters '(', ')', ';', '#' and '&' are also forbidden, as they have special syntax meaning.
if you choose to create a terminology without any variable, called term-object (ex: '|R' or 'sin'), you are not allowed to use the characters: ' [', ']', '{', '}', '?', '!', ',', '.'.

New Definition