Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


1. A line on a weather map connecting points of equal atmospheric pressure. Also called isopiestic.
2. Any of two or more kinds of atoms having the same atomic mass but different atomic numbers.

[iso- + Greek baros, weight; see gwerə- in Indo-European roots.]

i′so·bar′ic (-bär′ĭk, -băr′-) adj.


(ˌaɪsəʊˈbærɪk) or


1. (Physical Geography) Also: isopiestic having equal atmospheric pressure
2. (Physical Geography) of or relating to isobars
References in periodicals archive ?
Contract awarded for purchase isobaric bupivacaine 5mg, fentanyl citrate 0.
The patent contains broad claims to sets of isobaric mass tags.
Management of patients with maxillary sinus atelectasis is primarily by endoscopic uncinectomy and maxillary antrostomy to remove the obstructing soft tissue and to reestablish an isobaric sinus.
The ICP-MS is susceptible to different effects than atomic emission machines, therefore, appropriate chapters on interferences and on sample preparation are included to illustrate the need, for example, to minimize chloride in order to reduce various isobaric interferences.
iTRAQ([R]) utilizes isobaric tags to label peptides from a tryptic digestion, followed by fractionation using a Nano HPLC column.
The Development Laboratory Analytical Nuclear Isotopic and Elemental (LANIE) CEA Saclay wants to equip a source mass spectrometer inductively coupled plasma (ICP-MS) to exploit the collision cells / reaction operating in MS mode / MS for resolving isobaric interferences.
A review of the compounds' chemical structures suggested that an isobaric interference caused by the parent trazodone molecular ion was unlikely, but interrogation of trazodone's chemical structure revealed an mCPP moiety (Fig.
However, the study which found greater spread in obese patients used isobaric local anaesthetic, which is associated with increased variability in block level (1).
The instrument, developed by marine geochemist Jeff Seewald and engineers at WHOI, is called the Isobaric Gas-Tight sampler, or IGT.
The specific volumes were examined at pressures and temperatures in the range 30-200 MPa and 50-250[degrees]C, respectively, in a measurement mode of isobaric heating with a heating rate of 5[degrees]C/min.
For the purposes of this work, the thermal exergy Exth of an ideal gas stream is calculated as a function of mass flow rate m, isobaric heat capacity [c.
Isobaric vapor-liquid equilibria in the binary systems formed by p-xylene with 1,2-dichloroethane, 1,1,4-trichloroethane and 1,1,2,2-tetrachloroethane at 66.