Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word perianthium could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
Pĕrĭander, dri, m., = Περίανδρος, son of Cypselus, a king of Corinth, and one of the seven wise men of Greece, Gell. 16, 19, 4; Aus. Lud. Sept. Sapient. fin.; Hyg. Fab. 221.