1. underfiring - Noun
2. underfiring - Verb
Intentional operation of a boiler, furnace, oven, etc., at a low level.
Antonym: overfiring
The state of not burning fuel at the desired level, and thus not providing heat efficiently.
Antonym: overfiring
(also attributively) Heating from below.
Antonym: overfiring
(ceramics) The state of being insufficiently fired or underfired.
Antonym: overfiring
underfiring
present participle of underfire