orifice

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orifice

[′ȯr·ə·fəs]
(electromagnetism)
Opening or window in a side or end wall of a waveguide or cavity resonator through which energy is transmitted.
(science and technology)
An aperture or hole.

orifice

orifice
A mouth, aperture, opening, perforation, passage, or hole. The size of an orifice normally is fixed.
References in classic literature ?
But as soon as two drops of blood have thus passed, one into each of the cavities, these drops which cannot but be very large, because the orifices through which they pass are wide, and the vessels from which they come full of blood, are immediately rarefied, and dilated by the heat they meet with.
The proportional width of the gape of mouth, the proportional length of the eyelids, of the orifice of the nostrils, of the tongue (not always in strict correlation with the length of beak), the size of the crop and of the upper part of the oesophagus; the development and abortion of the oil-gland; the number of the primary wing and caudal feathers; the relative length of wing and tail to each other and to the body; the relative length of leg and of the feet; the number of scutellae on the toes, the development of skin between the toes, are all points of structure which are variable.
Picture to yourselves," said I, "what this crater must have been when filled with boiling lava, and when the level of the incandescent liquid rose to the orifice of the mountain, as though melted on the top of a hot plate.
But her face was a larger and freer copy, and her mouth in especial a happy divergence from that conservative orifice, a little pair of lips at once plump and pinched, that looked, when closed, as if they could not open wider than to swallow a gooseberry or to emit an "Oh, dear, no
This at once recalled to Adam's mind the light quivering above the well-hole in the darkness of that inner room at Diana's Grove, Oolanga's awful shriek, and the hideous black face, now grown grey with terror, disappearing into the impenetrable gloom of the mysterious orifice.
This huge sack had been sewn up at one end and only a small orifice left at the other.
Below this repulsive orifice the face was quite blank to the chin, for the thing had no mouth that I could discover.
Stopcocks, of which one has an orifice twice the size of the other, communicate between these receptacles and a fourth one, which is called the mixture reservoir, since in it the two gases obtained by the decomposition of the water do really commingle.
At this moment of anguish, he noticed, a little lower down than the balustrade whence he was crushing the thieves, two long stone gutters which discharged immediately over the great door; the internal orifice of these gutters terminated on the pavement of the platform.
Jav was shrieking still, and clawing at the royal couch that had already commenced to slide toward the centre of the room, where both Thuvia and Carthoris suddenly noted a small orifice which grew in diameter as the floor assumed more closely a funnel-like contour.
Daylight was filtering into the well from the orifice far above his head.
The nose was but a gaping orifice above a deformed and twisted mouth.