0 a (usually man-made) underground passage, especially one cut through a hill or under a river -- tunel
1 to make a tunnel -- vykopat tunel
They escaped from prison by tunnelling under the walls.
Termites tunnelled slowly in the dry sand, but diverted their tunnelling into the wet sand once it had been discovered.
Both are usually estimated using data derived by scanning tunneling microscopy from different surface specimens.
An infested tuber was defined as one with visible tunnelling damage, regardless of the presence or absence of larvae.
The percentage of stem tunnelled, internodes bored and cobs damaged did not significantly vary among treatments in the insecticide-treated plots (table 5).
The arenas were typically explored to their edges after four days, with all solid objects and gaps interconnected with many tunnels.
Of course new food sources will be discovered and the laboratory studies of tunnelling behaviour may yield valuable insights into this process.
Extract-treated sand barriers deterred tunnelling completely for 2-4 days at the higher extract concentrations tested, although partial penetration was seen in succeeding days.
Dynamically controlled protein tunneling paths in photosynthetic reaction centers.
