Concentrates As Opponent Turns The Air Blue In Conversation

• the concentration of attention or energy on something

• maximum clarity or distinctness of an image rendered by an optical system

• maximum clarity or distinctness of an idea

• a central point or locus of an infection in an organism

• special emphasis attached to something

• a point of convergence of light (or other radiation) or a point from which it diverges

• a fixed reference point on the concave side of a conic section

• direct one's attention on something

• cause to converge on or toward a central point

• bring into focus or alignment; to converge or cause to converge; of ideas or emotions

• become focussed or come into focus

• put (an image) into focus

• extract the essence of something by boiling it

• be cooked until very little liquid is left

• steep in hot water

• A glucoside obtained from woad and other plants, the source of natural indigo.

• An indigo-forming substance found in urine and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin); an indoxyl sulphate of potash.