Anagrams of: HYDROLOGICALLY

• the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation

• a form of government having two joint rulers

• a political system governed by a few people

• the branch of medicine dealing with the heart and its diseases

• in a lyrical manner

• A day on which a festival, religious event, or national celebration is traditionally observed.

• A day declared free from work by the state or government.

• A period of one or more days taken off work for leisure and often travel; often plural.

• A period during which pupils do not attend their school; often plural; rarely used for students at university (usually: vacation).

• A period during which, by agreement, the usual payments are not made.

• A gap in coverage, e.g. of paint on a surface, or sonar imagery.