vesper:
1) a meal or snack consisting of bread, cold cuts, cheese etc., usually between breakfast and lunch or in the evening (used in southern germany only) - living just 15 km from the southern germany boarder, I myself did only relate the word 'versper' to the late afternoon snack-brake (probably because of definition 2) hereafter
2) [rel.] the sixth of the seven canonical hours

in swiss-german we use the word 'Znüni' (german: 'um 9 Uhr', english 'at 9 o'clock') for the snack between breakfast and lunch. Kindergarden children typically bring with them a 'Znüni-Box' every day.