side branch
- offshootDerivative outgrowth
- tributaryStream entering larger river
- limbJointed bodily projection
- twigSlender woody shoot
- spurIncentive or heel device
fork · lateral · stem · bough · tendril · shoot · ramification · divergence · feeder · creek · artery · vein · dendrite · splitting · growth · sprout · branching · subsidiary
structural centrality
side branchmain branch
Primary or central division
trunk · main stem · main line · central axis · mainline
directional flow
side branchdirect route
Straightest path available
straight path · through line · continuation · main channel · main course