riser

One who rises, especially from sleep.

The vertical part of a stair step.

A platform, as for elevating a group of people above a crowd, often arranged with similar platforms in tiers.

A riser pipe; any pipe which conveys a supply of hot or cold water, steam, gas, etc., from the source of supply upward, as through a building to bathrooms, radiators, or gas-fixtures.

In bee-keeping, a portion of a hive inserted under another hive to make more room.

In electricity, a wire connecting the various floors of a building and serving for the transmission of currents for electric lighting or power.

One who or that which rises.

One who revolts; a rebel or rioter.

In angling, a fish considered with reference to its manner of rising.

In founding: An opening in a molding-flask into which the molten metal rises as the flask is filled; a head.