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Glossary of plant terms

Search our dictionary of 3,300 botanical and plant-related terms – the largest online.
Or browse the descriptions and definitions using the A-Z.


Means "very white" in Latin.


Means "of Zanzibar, Africa" in Latin.


Means "striped colours" in Latin.


Means "of the wild west" in Latin.


Means "of Ceylon" in Latin.


An element (symbol Zn) which is a micronutrient, needed by plants but only in small quantities. If deficient then the plant may suffer leaf deformation often with a yellow mottling between the veins. To correct a zinc deficiency, manure or a balanced fertilizer can be used which contains proportions of nitrogen, phosphorus and potassium (NPK) plus other minor nutrients.


This is an inorganic preventive fungicide which is used against a range of fungal diseases that affect the foliage such as downy mildews.


Means "zone of colour" in Latin.


Zooplankton is a term given to non-photosynthetic plankton, which are microscopic organisms suspended, floating or swimming in salt water or fresh water. Zooplankton are therefore very small animals, gametes, or the young of larger animals which may feed on phytoplankton (or other zooplankton).

zucchini yellow mosaic virus

Bright yellow mosaic patterns develop on foliage and the whole plant is distorted and stunted. Fruits grown are knobbly.


Refers to a flower with bilateral symmetry, such as the flowers of many orchids, where the left side mirrors the right side but the top half is different from the bottom half.


The cell formed by the fusion of a male and female gamete. For example, the haploid female ova (or egg) in the flower is fertilised by the haploid male pollen grain, to produce the diploid zygote which will develop into the embryo plant.

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