Definition
'Motile' describes something capable of movement. It emphasizes the inherent ability to move independently. Unlike 'mobile,' which can mean something is simply transportable, 'motile' means it can move itself. Think of bacteria swimming in water versus a suitcase being carried. Motility implies internal mechanisms or structures that enable self-propulsion. It's like the difference between a sailboat (motile with wind power) and a raft (mobile but not motile on its own).