Leaf gap is a small region at the base of petiole in a leaf which separates the vascular tissue of petiole and stem. Synonyms for the word leaf gap include petiolar sinus, interpetiolar region, and intranodal tract. The petiolar sinus is the indentation found between the leaf and the stem, while the interpetiolar region refers to the space between two adjacent petioles. Lastly, the intranodal tract refers to the short section of stem that connects two adjacent nodes. These synonyms may be used interchangeably, providing a descriptive way to communicate the same idea in various contexts. Understanding these synonyms can aid in the clear communication of botanical concepts.