Wood Tannin
The tannins in a wine that are attributable to the barrels in which the wine aged, as opposed to the tannins in the grapes.
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Wood tannin: Tannin that came originally from wood, as in a wine that was oak-aged.
Wines whose components - acid, alcohol, tannin and residual sugar - relate in a balanced way, so none overwhelm the others.
Wood tannin
Tannins that are attributable to the barrels in which the wine was aged, rather than from the grapes.
tanninA substance found in the skins, stems and seeds of grapes (grape tannins) and imparted by oak barrels (wood tannins), that, in balance, can lend structure, texture and ageability to red wines.
American oak barrels are cheaper, have a wider grain and lower wood tannins as compared to French oak.
Wine aged in small new oak barrels (Barrique) takes on some of the compounds in the barrel, such as vanillin and wood tannins.
Wine aged in new oak barrels takes on some of the compounds in the barrel, such as vanillin and wood tannins. After 3 or 4 years, most of a barrel's flavor compounds have been leached out and it is well on its way to becoming "neutral." ...
Oak planks inserted into wine as a less expensive means of imparting wood tannins, oak character.
Steen...
South African term for "Chenin Blanc", sometimes confused with "Stein".
In young reds look for tannin with layers of underlying fruit. An essential grape preservative; (grape tannin) derived from grape skins, seeds and stems during fermentation, or (wood tannin) from oak barrels.
In addition to the subtle oxygenation and spice notes, oak imparts to the wine ligneous wood tannins which give structure to the wine without adding as much astringent bite as the tannins derived from the phenolic compounds of the grape.
 See also: Barrel, Tannin, Tannins, Wine, Fermentation
  
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