In ingredient lists, does "lime" mean the fruit or the chemical?

Ingredient lists on packaged foods sometimes list "lime". Does this refer to the citrus fruit, or to the chemical calcium hydroxide?

As an example, Mission Organics White Corn Tortilla Chips list "trace of lime" as the last ingredient. This could indicate some part (or juice) of the citrus fruit, included as a seasoning (common in Mexican cuisine). On the other hand, there is a process for preparing corn (maize in some dialects) which involves cooking it in a calcium hydroxide solution. So if these chips are made using this process, "trace of lime" could refer to calcium hydroxide residues. Which is meant?