>I was ;unable to find this word anywhere else. Tsuwm, if you please?

better late than never*, here's W3:

Main Entry: co·implicant
Function: adjective
Etymology: co- + implicant
logic : mutually implying : EQUIVALENT 2b

*I'll never catch up with everything below the fold, but I discovered this with a search for (vanity thy name is) 'tsuwm'