You had proposed REMANENT, but said it would be nice to have a term that "rhymes" with the existing two. I was reviewing the language in the CAD software (thinkdesign) my company produces, because our company, think3, started in Bologna, Italy 18 years ago and most of the development work still occurs there. Some of the language needs to be adjusted from Italian English to American English. Within the software and the tutorial materials, I found the term ESPLEMENTARY used to represent an angle which completes a given angle to 360 degrees. Discussion with the folks in Italy implies that the usage is not particularly rare.
The word "esplementary" comes from the Latin "explementum" meaning "filling" or "stuffing". I've searched over the Net for a suitable term for filling to 360 degrees, including your discussion with Mr. Keyton of Dallas (copy below). Your discussion was about as good as it got. Based on that, and the desirability of the rhyming ending, I am approving the continued usage of esplementary within thinkdesign software.
I welcome any comments you might have on the subject.
My best regards, Steve Wells UI Wizard think3 408-987-6803 Steve.Wells@think3.com