The Collaborative International Dictionary
Coinstantaneous
Coinstantaneous \Co*in"stan*ta"ne*ous\, a.
Happening at the same instant.
--C. Darwin.
Wiktionary
coinstantaneous
a. Happening at the same instant.
Usage examples of "coinstantaneous".
In the case of the prawn-like crabs, their movements were as coinstantaneous as in a regiment of soldiers.