The word "pteropsida" is spelled with the IPA symbols /tɛrɒpsɪdə/. The first syllable "ptero" is an exception in English, as it starts with the silent consonant cluster "pt". The second part of the word "opsida" is pronounced with a short "o" sound, followed by "psi" pronounced with a "ps" blend sound. The final syllable "da" is pronounced as "də". Pteropsida is a term used to describe a class of plants that includes ferns and their relatives.
The term "Pteropsida" is derived from the combination of two Greek words: "pteron" meaning wing, and "opsis" meaning appearance or sight. In botanical taxonomy, the word "Pteropsida" is a former division of plants that included ferns and some related groups. The name was likely given due to the feathery or wing-like appearance of fern fronds, which is characteristic of plants within this group.