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n. A divisible substance. Glanvill. [ 1913 Webster ]

a. [ L. indivisibilis: cf. F. indivisible. See In- not, and Divisible. ] [ 1913 Webster ]

1. Not divisible; incapable of being divided, separated, or broken; not separable into parts. “One indivisible point of time.” Dryden. [ 1913 Webster ]

2. (Math.) Not capable of exact division, as one quantity by another; incommensurable. [ 1913 Webster ]

n. 1. That which is indivisible. [ 1913 Webster ]

By atom, nobody will imagine we intend to express a perfect indivisible, but only the least sort of natural bodies. Digby. [ 1913 Webster ]

2. (Geom.) An infinitely small quantity which is assumed to admit of no further division. [ 1913 Webster ]

Method of indivisibles, a kind of calculus, formerly in use, in which lines were considered as made up of an infinite number of points; surfaces, as made up of an infinite number of lines; and volumes, as made up of an infinite number of surfaces. [ 1913 Webster ]

n. The state of being indivisible; indivisibility. W. Montagu. [ 1913 Webster ]

a. (Surv.) Mutually visible, or in sight, the one from the other, as stations. [ 1913 Webster ]

a. [ F. invisible, L. invisibilis. See In- not, and Visible. ] 1. Incapable of being seen; not perceptible by vision; not visible. Specifically: (a) Not visible due to an inherent property, such as lack of color; as, the invisible air; invisible ink; (b) hidden from view; out of sight; (c) Not perceptible due to lack of light; (d) Too small or too distant to be perceived; as, people on the ground invisible at cruising altitude. [ 1913 Webster +PJC ]

To us invisible, or dimly seen
In these thy lowest works. Milton. [ 1913 Webster ]

2. Hidden from the public; as, invisible transactions. [ PJC ]

3. imperceptible to the mind; as, differences invisible to most observers. [ PJC ]

Invisible bird (Zool.), 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 mistaken for it. [ 1913 Webster ]

n. 1. An invisible person or thing; specifically, God, the Supreme Being. [ 1913 Webster ]

2. A Rosicrucian; -- so called because avoiding declaration of his craft. [ Obs. ] [ 1913 Webster ]

3. (Eccl. Hist.) One of those (as in the 16th century) who denied the visibility of the church. Shipley. [ 1913 Webster ]

n. A fluid that has no color in the visible spectrum, but may be detected under certain conditions, as under ultraviolet light. It may be used to write notes not readable under normal light. [ PJC ]

n. The quality or state of being invisible; invisibility. [ 1913 Webster ]

a. Susceptible of subdivision. [ 1913 Webster ]

a. Indivisible. [ 1913 Webster ]

a. Invisible. [ Obs. ] Wyclif. [ 1913 Webster ]

a. [ L. visibilis, fr. videre, visum, to see: cf. F. visible. See Vision. ] 1. Perceivable by the eye; capable of being seen; perceptible; in view; as, a visible star; the least spot is visible on white paper. [ 1913 Webster ]

Maker of heaven and earth, and of all things visible and invisible. Bk. of Com. Prayer. [ 1913 Webster ]

Virtue made visible in outward grace. Young. [ 1913 Webster ]

2. Noticeable; apparent; open; conspicuous. Shak. [ 1913 Webster ]

The factions at court were greater, or more visible, than before. Clarendon. [ 1913 Webster ]

Visible church (Theol.), the apparent church of Christ on earth; the whole body of professed believers in Christ, as contradistinguished from the invisible, or real, church, consisting of sanctified persons. --
Visible horizon. Same as Apparent horizon, under Apparent. [ 1913 Webster ]

-- Vis"i*ble*ness, n. -- Vis"i*bly, adv. [ 1913 Webster ]