Are there standard technical terms for the location of the wheels on tricycles? I was writing up an answer to another question and was using clumsy terms such as front-wheel on a delta and rear wheel on a tadpole for the singleton wheel that isn't part of a pair. I assume we could just call the singleton the drive-wheel or steering wheel, depending on the configuration although that doesn't always work.
I'm particularly interested if there is a configuration-neutral term for the wheels that are paired (front wheels on a tadpole; rear wheels on a delta). They are what make tricycles unique in being located side-to-side of the rider and they are unique in having single-sided hubs, etc. Are they collectively called the paired wheels, side wheels, or something else? Or is there no agreement and we have to specify the configuration (tadpole/delta) and location (front/rear) each time?