asymptotic
/əˈsɪmptɒtɪk/Definitions
1. adjective
approaching or closely resembling a mathematical asymptote, especially in its tendency to move indefinitely close to a particular point without actually reaching it.
“The function’s asymptotic behavior is difficult to predict.”
2. noun
a function or curve that has an asymptote
“The mathematician studied the properties of the asymptotic function.”