Special purpose acquisition company (SPAC). A special purpose acquisition company (SPAC), sometimes called a blank check company or an empty shell company, uses an initial public offering (IPO) to raise money it will use to purchase or merge with an existing company.
The objective of a cloverleaf is to allow two highways to cross without the need for any traffic to be stopped by red lights, even for left and right turns. The limiting factor in the capacity of a cloverleaf interchange is traffic weaving.
Lucky clover and lucky leaf redirect here. The term is also often used for the wood-sorrel (Oxalis acetosella) and Oxalis tetraphylla, a common potted plant. For the popular 20th-century song, see  I'm Looking Over a Four Leaf Clover . For the 2007 Second Person song, see Four Leaf Clover (Second Person song) .