'broad-rostrate' originates from English as a compound of 'broad' (Old English 'brād') and New Latin 'rostrate' (from Latin 'rostrum'), where 'broad' meant 'wide' and 'rostrum' meant 'beak' or 'beak-like projection'.

'rostrum' in Latin (meaning 'beak' or projecting beak-like structure) developed into New/Modern Latin 'rostrate' used in scientific descriptions; English adopted 'rostrate' for anatomical and zoological usage, and it was later compounded with the adjective 'broad' to form 'broad-rostrate' in technical descriptions.

Initially, 'rostrum' meant 'beak' in Latin; over time 'rostrate' came to mean 'having a beak or beak-like projection' in scientific contexts, and combined with 'broad' to denote 'having a broad beak' in modern usage.