As a noun cryogen
is (physics) a cryogenic liquid (that boils below about -160°c) used as a refrigerant.
As a pronoun ra is
upon him/her, on him/her, unto him/her.
cryogen
English
Noun
(
en noun)
(physics) a cryogenic liquid (that boils below about -160°C) used as a refrigerant
ra
Translingual
Symbol
(head)
Symbol for radium.
----