IUPAC Gold Book - Alphabetical index

A B C D E F G H I J K L M NOP Q R S T U V W X Y Z all (6414 items)

OBF
observation height, $h obs$ in flame emission and absorption spectrometry
observation pathlength, $l obs$ in flame emission and absorption spectrometry
observation space in flame emission and absorption spectrometry
observation volume, $V obs$ in flame emission and absorption spectrometry
observed rate coefficient^quantity
occlusion (molecular)
octahedro- in inorganic nomenclature
odd-electron ion
ODMR (Optically Detected Magnetic Resonance)
odour threshold in atmospheric chemistry
ohm ^unit
OIP
OLED
olefins
oligo
oligomer
oligomer molecule
oligomeric
oligomerization
oligonucleotides
oligopeptides
oligosaccharides
OMA
one-bond-flip (OBF)
one-colour indicator
one-photon photochromism
onion morphology
onium compounds
OPA
open atomizer
open dynamic system in spectrochemical analysis
open film
open hearth furnace in atmospheric chemistry
open static system in spectrochemical analysis
open-shell systems
open-tubular column in chromatography
operational pH cell
operational pH standard
operator gene
operon
OPO
opposing reactions
optical activity
optical antipodes
optical density
optical filter
optical isomers
optical multi-channel analyser (OMA)
optical parametric amplification (OPA)
optical parametric oscillator (OPO)
optical parametric processes
optical purity
optical resolution
optical rotation
optical rotatory power
optical spectroscopy
optical yield
optical-beam error in spectrochemical analysis
optically active polymer
optically labile
optoacoustic spectroscopy
orbital (atomic or molecular)
orbital energy
orbital steering
orbital symmetry
order of reaction, $n$ ^quantity
order parameter
order-disorder transition
ordered co-continuous double gyroid morphology
organelles
organic dye laser
organically modified silica
organically modified silicate
organically-modified ceramic
organic–inorganic polymer (OIP)
organo-
organoheteryl groups
organometallic compounds
organomodified ceramic
organyl groups
origin of replication (ori)
ortho acids
ortho amides
ortho esters
ortho- and peri-fused (polycyclic compounds)
ortho-fused (polycyclic compounds)
orthokinetic aggregation in colloids
osazones
oscillating reaction
oscillator strength, $f i j$
osmolality, $m$ ^quantity
osmolarity^quantity
osmotic coefficient, $ϕ$ ^quantity
osmotic concentration, $c$ ^quantity
osmotic pressure, $Π$ ^quantity
osones
osotriazoles
Ostwald ripening
out-isomer
out-of-plane bending coordinate in molecular geometry
outer electric potential, $ψ$ ^quantity
outer Helmholtz plane (OHP)
outer-sphere electron transfer
outgassing of a catalyst
output rate
overall activation energy
overlap integral, $S r s$
overpotential, $η$ ^quantity
oxa-di-π-methane rearrangement
oxenium ions
oxidant in atmospheric chemistry
oxidation
oxidation number
oxidation state
oxidation-reduction polymer
oxidation–reduction (redox) titration
oxidative addition
oxidative coupling
oxide network
oxidized species
oxidoreductases
oxime O-ethers
oximes
oxo acids
oxo carboxylic acids
oxo compounds
oxoacids
oxocarbons
oxonium ions
oxonium ylides
oxyacid (oxy-acid)
oxygen-flask combustion in spectrochemical analysis
oxylium ions
ozone hole
ozonides