noun
definition
A bulge, knob, swelling, spine or anything that protrudes.
synonyms
Examples of protuberances in a Sentence
When it is remembered that the punching tool was guided solely by the hand and eye, and that three or more blows of the mallet had to be struck for every dot, some conception may be formed of the patience and accuracy needed to produce these tiny protuberances in perfectly straight lines, at exactly equal intervals and of absolutely uniform size.
His observations of the protuberances on the sun, made during the total eclipse on the 10th of July 1860, are included in the work of Madler on the eclipse, published in 1861.
In some Sphacelariaceae branches may appear at their inception as lateral protuberances of the apical cell itself.
The design was then beaten into relief from the back with hammers and punches, the pitch bed yielding to the protuberances which were thus formed, and serving to prevent the punch from breaking the metal into holes.
That Zeno and Cleanthes crudely compared this presentation to the impression which a seal bears upon wax, with protuberances and indentations, while Chrysippus more prudently determined it vaguely as an occult modification or " mode " of mind, is an interesting but not intrinsically important detail But the mind is no mere passive recipient of impressions from without, in the view of the Stoics.
According to Hittorf he was the first who saw the three lines of the hydrogen spectrum, which a few months after his death were recognized in the spectrum of the solar protuberances, and thus solved one of the mysteries of modern astronomy.
The young leaves arise on the stem-apex as conical protuberances with winged borders, on which the pinnae appear as rounded humps, usually in basipetal order; the scale-leaves in their young condition resemble fronds, but the lamina remains undeveloped.
If a planet rotates on its axis so rapidly as to have a considerable ellipticity, and if it has satellites revolving very near the plane of the equator, the combined actions of the sun and of the equatorial protuberances may be such that the whole system will rotate almost as if the planes of revolution of the satellites were solidly fixed to the plane of the equator.
The knobs or protuberances on the head are enlarged hair follicles and are often full of parasitic barnacles and lice.
Plaice have obvious bright orange spots and rows of small bony protuberances on the head.
The depth was checked in our new channel, it seemed about five feet with no other protuberances.
He proposed to apply the same principles to the calculation of the disturbances produced in the rotation of the planets by external action on their equatorial protuberances, but was anticipated by Poisson, who gave formulae for the variation of the elements of rotation strictly corresponding with those found by Lagrange for the variation of the elements of revolution.