- In anatomy, a pore is any opening into or
through a tissue or body structure.
- In solar physics,a pore is a short-lived dark
spot in the Sun's photosphere resembling
a small sunspot without a penumbra.
Pores last less than an hour and range up to 2,500 kilometers in diameter. They
occasionally form where several granulation channels meet and sometimes
precede the development of sunspots.