Definition of Tracheid

1. Noun. Long tubular cell peculiar to xylem.

Generic synonyms: Vascular Tissue
Group relationships: Xylem

Definition of Tracheid

1. n. A wood cell with spiral or other markings and closed throughout, as in pine wood.

Definition of Tracheid

1. Noun. (botany) A tracheid cell. ¹

¹ Source:

Definition of Tracheid

1. a long, tubular plant cell [n -S]

Medical Definition of Tracheid

1. Water conducting cell forming part of the plant xylem. Contains thick, lignified secondary cells walls, with no protoplast at maturity. Interconnects with neighbouring tracheids through pits, the end walls are not perforated. Compare: vessel elements. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Tracheid

tracheal tug
tracheal ulceration
tracheal vein
tracheal veins
tracheal wall stripe
trachealis muscle
tracheid (current term)
tracheid cell
tracheid cells

Literary usage of Tracheid

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Naturalist by American Society of Naturalists, Essex Institute (1905)
"A spiral tracheid of the protoxylem was immediately followed on its outer side, by a fibrous tracheid with round, variably distant bordered pits in one ..."

2. Physiological Botany: I. Outlines of the Histology of Phaenogamous Plants by George Lincoln Goodale (1885)
"... especially in wood of gymnosperms, where they form a characteristic feature both in fossil and 1 But the term tracheid, as usually understood, ..."

3. A Manual of the North American Gymnosperms: Exclusive of the Cycadales But by David Pearce Penhallow (1907)
"Pits on the lateral walls of the ray cells 1 per tracheid throughout, or in the early spring wood 2 per tracheid. 12. P. parviflora. ..."

4. Proceedings of the Academy of Natural Sciences of Philadelphia by Academy of Natural Sciences of Philadelphia (1903)
"This branch grows out transversely by means of a bordered pit into the lumen of a wood tracheid, through which it runs to the next medullary ray lying ..."

5. Identification of the Economic Woods of the United States: Including a by Samuel James Record (1919)
"In this the tracheid appears as the dominant element. Vessels are composed of segments which were originally tracheids before fusion; intermediate forms ..."

6. The Secondary Xylem of Hawaiian Trees by Forest Buffen Harkness Brown (1922)
"Such projections have been described as tracheid-like. ... projections are apparently derived from tracheid-like projections, and differ from the ..."

7. Forestry Quarterly by New York State College of Forestry (1915)
"Study of an eccentric section of White pine failed to indicate any close relation between ring width and tracheid length. The same was true in the Longleaf ..."

8. Proceedings of the Cambridge Philosophical Society by Cambridge Philosophical Society (1886)
"The tracheids of the Tew are at least 70 or 80 times as long as they are broad, so that in travelling transversely the length of a single tracheid the water ..."

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