(Wikipedia) A Boeing 737 main landing gear arrangement.
What defines a landing gear bogie (truck)?
In its airframe maintenance handbook, the FAA defines it as:
When more than two wheels are attached to a landing gear strut, the attaching mechanism is known as a bogie.
But, they go on and describe the Boeing 777 main landing gear (MLG) as:
A triple bogie main landing gear assembly.
That means each lateral pair of wheels is a bogie, which is what the undercarriage arrangements Wikipedia article calls a 2-wheel nose landing gear.
For me, a bogie is when a strut holds a longitudinal arrangement of wheels (like trains). For example, the MLG of a Sukhoi Su-34 (shown below) would be a bogie, but not a Boeing 737 MLG, despite both having two-wheels each.
Are there technical terms to distinguish the two images shown in this post?