Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

ICoCo
INTERP_KERNEL
ArcCArcCIntersector
ArcCSegIntersector
ComposedEdge
CrossTypeEdgeIntersector
Edge
EdgeArcCircle
EdgeIntersector
EdgeLin
ElementaryEdge
Interpolation
Interpolation2D
Interpolation3D	Class used to calculate the volumes of intersection between the elements of two 3D meshes
Interpolation3DSurf
InterpolationOptions
IntersectElement
IteratorOnComposedEdge
MergePoints
Node
PlanarIntersector
QuadraticPolygon
SameTypeEdgeIntersector
SegSegIntersector
TargetIntersector	Abstract base class of Intersector classes. These classes represent a target element and calculate its intersection with the source elements
MEDCoupling
BigMemoryObject
BlockTopology
CommInterface
ComponentTopology
DataArray
DataArrayAsciiChar
DataArrayAsciiCharIterator
DataArrayAsciiCharTuple
DataArrayByte
DataArrayByteIterator
DataArrayByteTuple
DataArrayChar
DataArrayDouble
DataArrayDoubleIterator
DataArrayDoubleTuple
DataArrayInt
DataArrayIntIterator
DataArrayIntTuple
DataArrayTemplate
DEC
DECOptions
DisjointDEC
ExplicitCoincidentDEC
ExplicitTopology
GlobalDict
InterpKernelDEC
InterpolationMatrix
MCAuto
MCConstAuto
MEDCoupling1DGTUMesh
MEDCoupling1GTUMesh
MEDCoupling1SGTUMesh
MEDCouplingAMRAttribute
MEDCouplingCartesianAMRMesh
MEDCouplingCartesianAMRMeshGen
MEDCouplingCartesianAMRMeshSub
MEDCouplingCMesh
MEDCouplingConstOnTimeInterval
MEDCouplingCurveLinearMesh
MEDCouplingDataForGodFather
MEDCouplingField
MEDCouplingFieldDiscretization
MEDCouplingFieldDiscretizationGauss
MEDCouplingFieldDiscretizationGaussNE
MEDCouplingFieldDiscretizationKriging
MEDCouplingFieldDiscretizationOnNodes
MEDCouplingFieldDiscretizationP0
MEDCouplingFieldDiscretizationP1
MEDCouplingFieldDiscretizationPerCell
MEDCouplingFieldDouble
MEDCouplingFieldInt
MEDCouplingFieldT
MEDCouplingFieldTemplate	A field template can be seen as a field without the array of values
MEDCouplingGaussLocalization
MEDCouplingIMesh
MEDCouplingLinearTime
MEDCouplingMappedExtrudedMesh
MEDCouplingMesh
MEDCouplingNatureOfField
MEDCouplingNoTimeLabel
MEDCouplingPointer
MEDCouplingPointSet
MEDCouplingRemapper
MEDCouplingStructuredMesh
MEDCouplingTimeDiscretization
MEDCouplingTimeDiscretizationInt
MEDCouplingTimeDiscretizationTemplate
MEDCouplingTimeKeeper
MEDCouplingTwoTimeSteps
MEDCouplingUMesh
MEDCouplingUMeshCell
MEDCouplingUMeshCellByTypeEntry
MEDCouplingUMeshCellByTypeIterator
MEDCouplingUMeshCellEntry
MEDCouplingUMeshCellIterator
MEDCouplingWithTimeStep
MEDFileAnyTypeField1TS
MEDFileAnyTypeField1TSWithoutSDA
MEDFileAnyTypeFieldMultiTS
MEDFileAnyTypeFieldMultiTSIterator
MEDFileAnyTypeFieldMultiTSWithoutSDA
MEDFileCMesh
MEDFileCurveLinearMesh
MEDFileData
MEDFileField1TS
MEDFileField1TSTemplateWithoutSDA
MEDFileField1TSWithoutSDA
MEDFileFieldGlobsReal
MEDFileFieldLoc
MEDFileFieldMultiTS
MEDFileFieldMultiTSWithoutSDA
MEDFileFieldNameScope
MEDFileFields
MEDFileFieldsIterator
MEDFileGTKeeper
MEDFileGTKeeperDyn
MEDFileGTKeeperSta
MEDFileIntField1TS
MEDFileIntField1TSWithoutSDA
MEDFileIntFieldMultiTS
MEDFileIntFieldMultiTSWithoutSDA
MEDFileMesh
MEDFileMeshes
MEDFileMeshesIterator
MEDFileMeshMultiTS
MEDFileParameter1TS
MEDFileParameterDouble1TS
MEDFileParameterDouble1TSWTI
MEDFileParameterMultiTS
MEDFileParameters
MEDFileParameterTinyInfo
MEDFileStructuredMesh
MEDFileUMesh
MemArray
MPIAccess
MPIProcessorGroup
NonCoincidentDEC
OverlapDEC
ParaFIELD
ParaMESH
ProcessorGroup
RefCountObject
RefCountObjectOnly
StructuredCoincidentDEC
TimeLabel
TimeLabelConstOverseer
TimeMessage
Topology