billetted

As a verb billetted

is (british) (billet).

As a letter b is

the second letter of the.

As a symbol b is

a blood type that has a specific antigen that aggravates the immune response in people with type a antigen in their blood they can receive blood from type b or type o, but cannot receive blood from ab or a.

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb billetted is

(british) (billet).