pŏrus: i, m., = πόρος,
I a passage, channel in the body: cordis sui, Ambros. Hexaëm. 3, 9, 39; of the air passages, Isid. 11, 1, 80; cf.: pori meatus, Plin. 20, 21, 84, § 228 (al. permeatus).
pōrus: i, m., = πῶρος,
I tufa, Plin. 36, 17, 28, § 132; 36, 6, 9, § 53.