The term "green lemon" can refer to different things, depending on the context. Here are a few possible interpretations:

1. Unripe Lemon:

   • In some cases, "green lemon" might simply refer to a lemon that is not yet fully ripe. Unripe lemons are typically green and become yellow as they ripen. Green lemons may have a more tart and less sweet taste compared to fully ripened ones.

2. Lime:

   • Sometimes, the term "green lemon" is used interchangeably with "lime." Limes are a citrus fruit that is smaller and generally greener than lemons. There are two primary types of limes: Persian limes (also known as Tahiti or Bearss limes) and Key limes. Both have a green color when ripe.

3. Varieties of Lemons:

   • There are lemon varieties with a greenish hue, especially when they are not fully ripe. For example, the Eureka lemon variety is one that can have a greenish tint even when mature.

4. Citrus Trees:

   • The term might also be used in the context of citrus trees. Lemon trees often have green leaves and green fruit that turns yellow as it ripens.

5. Regional Terminology:

   • In some regions or local dialects, people might use the term "green lemon" to describe a specific type of citrus fruit or a stage of ripeness.