"relating to a base," 1828, from base (n.) + -al (1).

Having to do with the base of a crystal.

Pertaining to the base or lower part of an organ or plant part.

In plants that form rosettes, the basal leaves are those that arise directly from the crown of the plant, and which often differ from leaves arising from the stem.

A cane that originates from the base of the plant.

(1) At or near the base of a branch or trunk. (2) At or near a plant's crown.

base (pop)

Describes the side of the cell in relation to its position in the body; the basal membrane faces away from the outside surface of the body or the lumen of internal cavities.

[Position] -- Arising at base; e.g. basal nerve is a nerve arising at (or very close to) the base of lamina.

(adj) especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem(adj) serving as or forming a base(adj) of primary importa [..]

Preferred cladistic substitute for "primitive", as it is felt the latter may carry false connotations of inferiority or a lack of complexity. In cladograms, basal taxa are those terminal taxa that first diverged from the root. The term basal is only be correctly applied to clades (species or higher groups) of organisms, not to individual [..]

Towards the base of the wing.

at or towards the base, closer to the point of attachment

Proximal end of a structure; i.e. the base of the scale antenna

 the base of a structure-usually that nearest to the body. Basitarsus:   

 the point of an appendage closest to its attachment to the body. Sometimes referred to as proximal.

At or towards point of attachment or main body.

of, at, or forming the base of something

Of or pertaining to the base, as in the first, or basal segment of an appendage. Opposite of terminal and apical. See also proximal.

The area of the wings that is closest to the thorax.

Arising from the base of the stem.

Having to do with the base (basal pinicoid).

(1) At or near the base of a branch or trunk. (2) At or near a plant's crown.

At or near the base.

basic, elementary; relating to, or forming, the base, or point of origin ''This is the basal idea.'' ''The organism needs more energy on basal maintenance.'' ''A basal reader is a kind of book [..]