Answer: crawler

AnswerCrossword Clue
CRAWLERVehicle with caterpillar treads
CRAWLEROne moving on all fours
CRAWLEROne-year-old, usually
CRAWLERWorm for bait
CRAWLERNight ...
crawlerone that crawls (to move with the body close to the ground)
crawlerA tractor or other vehicle moving on an endless caterpillar track
crawlerA program that searches the World Wide Web, typically in order to create an index of data
crawlerA thing that crawls or moves at a slow pace, esp. an insect