Goma Tragacanto (Vegetable Gum)
/ GOH-mah trah-gah-KAHN-toh /
ConstructionSpanish
Definition
Why it matters
It has to be tasteless and burn clean, and it goes on in tiny amounts - excess shows as a shiny patch and can create a hard spot in the burn line.
In context
"Barely any goma on that cap - you can see it glazing."