Irregular menstruation is when the length of the cycle is more than 35 days, or if the duration varies. A period, or menstruation, is the part of the menstrual cycle in which the endometrium, which is the lining of the uterus, is shed. This appears as bleeding from the womb that is released through the vagina.
1 There is no universally agreed symbol for the cubic foot/feet. 2  Various abbreviations are used, dependent on context, including (but not exclusively) cubic ft, cu ft, cb ft, cbf, ft3, foot3, feetÂ³, ftÂ³.  The cubic foot is used mainly in the United States, Canada and the United Kingdom as a measurement of volume.
Water at rest; i.e., ponds, lakes, reservoirs, and in the soil, is measured in units of volume â gallon, cubic foot, acre-inch, and acre-foot. Cubic Foot - The volume of water that would be held in a. container one foot wide by one foot long by one foot deep. Acre-lnch - The volume of water that would cover one acre. (43,560 square feet) one inch deep. Acre-Foot - The volume of water that would cover one acre. one foot deep. Flow Units. Water in motion; i.e., flowing in streams, canals, pipe-. lines, and ditches, is measured in units of volume per unit of. timeâgallons per minute (gpm), cubic feet per second (cfs), acre-inches per hour and acre feet per day.