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noun(cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elementstype of:
Definition that contains ylem
- vascular bundle a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
- ligneous consisting of or containing lignin or xylem
- vascular strand a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
- tracheid long tubular cell peculiar to xylem
- fibrovascular bundle a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
- cambium a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth