1. veining - Noun
2. veining - Verb
of Vein
Source: Webster's dictionaryGilson turquoise is made in both a uniform colour and with black "spiderweb matrix" veining not unlike the natural Nevada material. Source: Internet
A significant portion of the Nevada material is also noted for its often attractive brown or black limonite veining, producing what is called "spiderweb matrix". Source: Internet
The flowers have five petals and are coloured white, pink, purple or blue, often with distinctive veining. Source: Internet