A person who or thing which makes something rigid; (Philosophy) a modifying word or expression used to establish a description, predicate, etc., as rigid.
Origin
1960s; earliest use found in U.S. Patents. From rigidify + -er.
Definition of rigidifier in US English:
rigidifier
nounrɪˈdʒɪdɪfʌɪə
A person who or thing which makes something rigid; (Philosophy) a modifying word or expression used to establish a description, predicate, etc., as rigid.
Origin
1960s; earliest use found in U.S. Patents. From rigidify + -er.