Definitions

1. adjective

Of, relating to, or characteristic of an aperture.

“The apertural structure of the microscope allowed for precise observations.”

2. adjective

Related to the mouth or opening of a shell.

“The apertural muscles of the snail played a crucial role in its defense mechanisms.”

3. noun

An aperture or opening, especially in a shell.

“The apertural feature of the sea shell caught the attention of the naturalist.”