Deca, in compounds, signifies ten.

Deciduous

Falling off, as the leaves of a large class of trees and shrubs in autumn, or the sepals and petals of most flowers after expansion.

Decimate

Bent downwards.

Decompound

Having many divisions.

Decumbent

Applied to plants with trailing barren and ascending flower stems.

Decurrent

Continued downwards, as the blade of the leaves of some plants,forming a wing-like appendage to the stem.

Decussate

Applied to leaves arranged in alternating pairs,forming four lines.

Deflexed

Turned downwards.

Dehiscence

The bursting or splitting of the seed-vessel.

Dentate

Toothed, having triangular teeth. Dentate - crenate, having rounded, pointed teeth. Dentate-serrate,having tapering sharp-pointed teeth projecting or curved towards the tip of a leaf like the teeth of a saw.

Di, in compounds, signifies two.

Diadelphous

Stamens in two bundles or fascicles.

Dichlamydeans

Having both calyx and corolla.

Diclinous

Unisexual, stamens and pistils in different flowers.

Dicotyledonous

Having two seed-leaves.

Didynamous

Having four stamens, two shorter than the others.

Digitate

Divided into distinct lobes in a radiate manner, as the leaves of Lupinus polyphyllus and Horse-Chestnut.

Dimidiate

The two halves of an organ very unequal in size.

Dioecious

Bearing the sexes on different individuals.

Discolor

Applied to leaves differing in the colour of the upper and lower surfaces, or with an admixture of any other colour and green.

Disk

Applied to the organ or organs between the stamens and ovary, usually consisting of scales or a fleshy ring,

Dissected

Deeply divided into many narrow lobes.

Dissepiments

The partitions of an ovary or fruit.

Distichous

Arranged in two opposite rows.

Dorsal

Appertaining to the back.

Drupe

A fleshy fruit having a hard putamen or endocarp, as the Cherry.

Dulcis

Sweet, agreeable.

Duramen

The heartwood or centre of Exogenous trees, and the outer part of the stem of Endogens.