What are sinuses?

English Language Tests, Intermediate level

ESL/EFL Test #769 [color=blue]“Dialogue Practice: Going to the Doctor (1)”, question 3

Doctor: Are your sinuses as well?

(a) swamped
(b) stuck
© congested
(d) steamed

English Language Tests, Intermediate level

ESL/EFL Test #769 [color=blue]“Dialogue Practice: Going to the Doctor (1)”, answer 3

Doctor: Are your sinuses congested as well?

Correct answer: © congested
[size=200]_________________________[/size]

what is sinuses?

Don’t you have a DICTIONARY?