Pitching
PITCH'ING, participle present tense Setting; planting or fixing; throwing headlong; plunging; daubing with pitch; setting, as a tune.
1. adjective Declivous; descending; sloping; as a hill.
PITCH'ING, noun In navigation, the rising and falling of the head and stern of a ship, as she moves over waves; or the vertical vibration of a ship about her center of gravity.
PITCH'-ORE, noun Pitch-blend, an ore of uranium.