1. (Life Sciences & Allied Applications / Botany) (of plants) having parts arranged in groups of three
"Timerous" plants are classified as such according to their structure. Plants with parts that are arranged in groups of three are timerous (not to be confused with "timorous," which is fearful and timid).
Wheat is classified as timerous since its plant parts are grouped in threes. For instance, the male plant has three stamens while the flowers are also timerous (three parts).
Not every part of the wheat plant is timerous. For instance, the female flower has only two styles that emerge from the one ovary of the flower.
This variance is one aspect of the wheat plant that can cause confusion.