9-Letter Words Containing: _,_,E,E,M,N,P,R

• any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active

• the act of returning money received previously

• payment of a debt or obligation

• a chemical substance secreted externally by some animals (especially insects) that influences the physiology or behavior of other animals of the same species

• anything short-lived, as an insect that lives only for a day in its winged form

• of or relating to the sky or heavens

• the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

• inspiring awe

• European garden herb with purple-tinged flowers and leaves that are sometimes used for salads

• any of several plants of the genus Anagallis

• A measure of the degree to which a material allows a fluid to permeate it.

• The reciprocal of reluctance in a magnetic circuit; the analogue of conductance in an electrical circuit.

• A partially shaded area around the edges of a shadow, especially an eclipse.

• A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.

• An area of uncertainty or intermediacy between two mutually exclusive states or categories.

• An area that lies on the edge of something; a fringe.

• Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.

• (in "ischaemic penumbra", after a stroke) A region of the brain that has lost only some of its blood supply, and retains structural integrity but has lost function.