A unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions

Usage examples of lumen.

Thomas said, wryly, as he let himself relax into the pool, savoring its comforts before steeling himself to get out, dress himself, feed himself, and take a trip to the center of what Lumen called the galaxy--implying thereby that the Milky Way was merely one sidereal system among many.

In fact, Lumen seems to me to be as dedicated a celebrant of complex inter-relationships between creatures of many different kinds as his adversary Aristocles.

He took the liberty of pressing Lumen on the issue when his comrades eventually fell uneasily silent as they gathered at the foot of the mighty cannon-cum-telescope that would transmit them to the heart of the sidereal system.

If Lumen were not sincere, and was not the friend to humankind as which it posed.

The fleshcore had to know about his ethereal passenger, but Lumen had seemed to think that the machines might not.

Nor did it seem to him, any longer, at all possible that he had actually said what he had said to the Great Fleshcore, or that he had been party to what the ethereal Lumen had said, by means of his dancing fingertips, to the luckless Aristocles .

Thomas said, wryly, as he let himself relax into the pool, savoring its comforts before steeling himself to get out, dress himself, feed himself, and take a trip to the center of what Lumen called the galaxyimplying thereby that the Milky Way was merely one sidereal system among many.

He had, of course, no way to think all this save for subvocalization, but Lumen prudently refrained from comment on the suspicion that he might be in accord with Aristocles on at least some matters concerning the nature of humankind.

After removing the trocar from the lumen of the imbedded implantation needle, he attached the syringe.

Our smooth-muscle cells are born with complete instructions, in need of no help from us, and they work away on their own schedules, modulating the lumen of blood vessels, moving things through intestines, opening and closing tubules according to the requirements of the entire system.

In infants up to six months botulinum can replicate because of the relative sterility of the intestinal lumen and the low acidity.

Low acidity or relatively sterile intestinal lumen as a result of pretreatment with broad-spectrum antibiotics are often factors.

In the pale blue light of lumen reeds, the faces of the chanters appeared ravaged, their bodies misshapen.

In an instant, several million slender, rod-shaped microorganisms filled the lumen of the fallopian tubes.

Zelzony into a light airy room where mirrors danced lumen lines into sculptures that changed position as the angle of the sun changed and gradually acquired a flush as it sank toward the horizon.