semi-

1. Partially aquatic; living or growing partly on land and partly in water.
2. Having an aquatic early or larval form and a terrestrial adult form.
3. Adapted for living or growing in or near water; not entirely aquatic: "They were looking for semiaquatic plants and animals."

1. Partly automatic; an operation that is partly automatic and partly manual.
2. A reference to a firearm (rifle, pistol, etc.), automatically ejecting the cartridge case (spent shell) of a fired shot and loading the next cartridge from the magazine but requiring a squeeze of the trigger to fire each individual shot.

1. Partially self-governing; especially, with reference to internal affairs.
2. Having the powers of self-government within a larger organization or structure.
3. Ruled partly by its own citizens or rulers and partly by another country or region.

That which is partially broken into small fragments or reduced to powder; such as, stones, sediment, etc.