Thanks for your input everyone, it is exactly as I suspected. In colloquial French, at least in the world of Ice Dance, an "attitude" is any move done on one foot with the free leg extended, so arabesques, and pretty much any spiral position, with or without a catch-foot, you can think of.
I don't know if the English word "Spiral" covers all that (officially), or if there's another better term. I bet the ISU has something already though, so I'll be looking into that, thanks Black for the link to the ISU docs.
"Attitudes" are a type of "Pose" another word I was having trouble with, but apparently has an official ISU definition in English, so I will be digging into that, too. But a "Pose" includes all of the above, plus spread eagles, lunges, bauers and hydroblades and probably some other things.
There is added confusion, because this is solo dance, a category that exists in France, and apparently in the UK, too (??) but no where else. The French terminology is regulated by the Ice Dance commission of the FFSG (the French equivalent to NISA), but they don't bother to create English language versions. Since solo ice-dance is not recognized officially by the ISU, terminology for moves that aren't done in standard (i.e. couples) dance has evolved on its own trajectory. For example, to me a combination spin (from colloquial US English Freestyle skating) is a spin where you change position, so camel-sit, layback-Bielmann, etc, but in French Solo Ice dance a Combination spin means a change of foot. I need to see what the official ISU definitions are of that, as well.
If Solo Dance is in fact a category skated here, I would love it if any of you could point me to where NISA puts out its official rules governing solo ice dance.
Fun times ahead for me!