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Not distinct or distinguishable; not separate in such a manner as to be perceptible by itself; as, the indistinct parts of a substance. "Indistinct as water is in water." Shak.

Incapable of being perceived by the senses; imperceptible. Hence: Progressing by imperceptible degrees; slow; gradual; as, insensible motion. Two small and almost insensible pricks were found upon Cleopatra's arm. Sir T. Browne. They fall away, And languish with insensible decay. Dryden.

Done or occurring in an instant, or without any perceptible duration of time; as, the passage of electricity appears to be instantaneous. His reason saw With instantaneous view, the truth of things. Thomson.

Not perceptible to the touch.

Not tangible; incapable of being touched; not perceptible to the touch; impalpable; imperceptible. Bp. Wilkins. A corporation is an artificial, invisible, intangible being. Marshall. -- In*tan"gi*ble*ness, n. -- In*tan"gi*bly, adv.

Incapable of being seen; not perceptible by vision; not visible. To us invisible, or dimly seen In these thy lowest works. Milton. Invisible bird (Zoöl.), a small, shy singing bird (Myadestes sibilons), of St. Vincent Islands. -- Invisible green, a very dark shade of green, approaching to black, and liable to be mista…

A gliding, slipping, or gradual falling; an unobserved or imperceptible progress or passing away,; -- restricted usually to immaterial things, or to figurative uses. The lapse to indolence is soft and imperceptible. Rambler. Bacon was content to wait the lapse of long centuries for his expected revenue of fame. I. Tayl…

Not perceptible to the senses; no longer visible; as, an island lost in a fog; a person lost in a crowd.

To invest wich material characteristics; to make perceptible to the senses; hence, to present to the mind through the medium of material objects. Having wich wonderful art and beauty materialized, if I may so call it, a scheme of abstracted notions, and clothed the most nice, refined conceptions of philosophy in sensib…

and all existent bodies are composed; anything which has extension, occupies space, or is perceptible by the senses; body; substance.

A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus. -- Mi`cro*seis"mic (#), *seis"mic*al (#), a.

To render inert or imperceptible the peculiar affinities of, as a chemical substance; to destroy the effect of; as, to neutralize an acid with a base.

To wear out; to remove or destroy utterly by any means; to render imperceptible; as. to obliterate ideas; to obliterate the monuments of antiquity. The harsh and bitter feelings of this or that experience are slowly obliterated. W. Black.

The quality of being palpable, or perceptible by the touch. Arbuthnot.

Capable of being touched and felt; perceptible by the touch; as, a palpable form. Shak. Darkness must overshadow all his bounds, Palpable darkness. Milton.

Capable of being perceived; perceptible. -- Per*ceiv"a*bly, adv.

The quality or state of being perceptible; as, the perceptibility of light or color.

The interval between the diastole and systole of the heart. It is perceptible only in the dying.

Perceptible through a bodily or material organization; cognizable by the senses; external; as, the physical, opposed to chemical, characters of a mineral.

To appear at the mouth of the uterus so as to be perceptible to the finger in vaginal examination; -- said of a part of an infant during labor.