IPA: /ˈbræktɪoʊl/
KK: /bræk'tiːoʊl/
A small leaf-like structure that is often found on a flower stem, usually beneath a flower or flower cluster.
The bracteole helps to protect the developing flower buds.
Bracteole is formed from "bractea" (from Latin, meaning a thin plate or leaf) and the diminutive suffix "-ole" (meaning small). The word refers to a small, thin leaf-like structure, often found in the context of botany.
Think of a 'thin plate' ('bractea') that is 'small' ('-ole') — that's why a bracteole is a small leaf-like structure.