ligneous
Synonym discussion
Sense: adjective/1
'Ligneous' is a highly formal word used mainly in scientific or literary descriptions when something has the structure or appearance of wood. 'Woody' is the everyday choice in gardening and general English, especially for plants, smells, and flavours: you would normally say 'a woody stem' or 'a woody smell', not 'a ligneous smell'. 'Wooden' is the ordinary word for objects made of wood, such as chairs, boxes, and doors. The contrast with 'herbaceous' is especially important in botany: herbaceous plants keep soft green stems, while ligneous parts harden into wood-like tissue.
Etymology
Ligneous comes from Latin lignum, meaning 'wood'. The adjective ending -eous means 'made of' or 'having the quality of', so the word literally means 'wood-like' or 'having the nature of wood'.