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Umbratic. [R.] B. Jonson.

Suspicious; captious; disposed to take umbrage. [Obs. & R.] Sir H. Wotton.

Amphioxus in which the backbone is represented by a simple undivided notochord. The Vertebrata always have a dorsal, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia,…

One of the Vertebrata.

Of or pertaining to the Vertebrata; -- used only in the form vertebrate.

To brandish; to move to and fro; to swing; as, to vibrate a sword or a staff.

Adapted to, or used in, vibratory motion; having the power of vibrating; vibratory; as, the vibratile organs of insects.

The quality or state of being vibratile; disposition to vibration or oscillation. Rush.

The act of vibrating, or the state of being vibrated, or in vibratory motion; quick motion to and fro; oscillation, as of a pendulum or musical string. As a harper lays his open palm Upon his harp, to deaden its vibrations. Longfellow.

A small vibration. [R.] Chambers.

; vibratory. "A vibrative motion." Sir I. Newton.

A vibrating reed for transmitting or receiving pulsating currents in a harmonic telegraph system. (3)

Consisting in, or causing, vibration, or oscillation; vibrating; as, a vibratory motion; a vibratory power.

The lowest group of Vertebrata, including the amphioxus, in which no skull exists.

ll. Æolian attachment, a contrivance often attached to a pianoforte, which prolongs the vibrations, increases the

nchronous air blasts sufficient to operate a larger diaphragm with greater amplitude of vibration.

A hook, eyelet, or other device by which a piano wire is so held as to limit the vibration.

l cavity of many fishes. It originates in the same way as the lungs of air-breathing vertebrates, and in the adult may retain a tubular connection with the pharynx or esophagus.

The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals.

The celebrated work of Ptolemy of Alexandria, which contains nearly all that is known of the astronomical observations and theories of the ancients. The name was extended to other similar works.