What is manifold?

manifold air temperature

Glossary “manifold air temperature” Definition:
The temperature of the intake stream in the intake manifold, as increased by a heat riser or an Early Fuel-Evaporation system, and/or converted to an engine-control computer input by a sensor.

manifold

Glossary “manifold” Definition:
1). Device used to hold two or more gauges, with passages and flow provisions; used for testing and servicing purposes. 2). A conduit-like device used to channel the A/F mixture into an engine. 3). A conduit-like device used to duct the exhaust gas out of an engine.