Housing. Many dairy cattle are housed during the winter period, when grass is not growing. Some herds may be housed all year-round (known as âzero-grazingâ).The RSPCA does not support systems housing dairy cattle all year round.Two types of housing system are generally used:ousing. Many dairy cattle are housed during the winter period, when grass is not growing. Some herds may be housed all year-round (known as âzero-grazingâ).
annulus â(plural annuluses or annuli). 1  A ring-or donut-shaped area or structure. ( 2 geometry) The region in a plane between two concentric circles of different radius. ( 3 topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
Terminology. 1  Annulus: the ring-shaped object, the region bounded by two concentric circles. 2  Arc: any connected part of the circle. 3  Centre: the point equidistant from the points on the circle. 4  Chord: a line segment whose endpoints lie on the circle. 5  Circumference: the length of one circuit along the circle, or the distance around the circle. Diameter: a line segment whose endpoints lie on the circle and which passes through the centre; or the length of such a line segment, which is the largest distance between any two points on the circle.