an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; "all points on the same meridian have the same longitude"
the occurrence of incoming water (between a low tide and the following high tide); "a tide in the affairs of men which, taken at the flood, leads on to fortune" -Shakespeare
type genus of the family Veneridae: genus of edible clams with thick oval shells
the second nearest planet to the sun; visible from Earth as an early `morning star' or an `evening star'; "before it was known that they were the same object the evening star was called Venus and the morning star was called Lucifer"