At or near the base; also proximal;
In a phylogenetic tree, a lineage arising near or nearer the base, hence early;
Of placentation, when the ovules are attached to a central columnar placenta arising from the base of the ovary but not reaching the top.
Arising from or positioned at the base.
At, or forming at, the base of a stem or at ground level.
At or near the base, and, if leaves, those that sprout directly from the root or crown.
Leaves all grouped at the base of the plant. A radial arrangement of basal leaves is called a rosette.
At or near the base (as leaves).
At or near the base. In phylogenetics often used erroneously for a species-poor taxon or clade that is sister to a speciesrich one, but not meaning primitive.
At the base. In some plants all the leaves occur at the base of the stem, often in a rosette.
At the base or bottom of; generally used in reference to leaves at the base of the plant.
Located at the bottom of something, or forming its base.
Springing directly from the base of the plant rather than from an aerial stem; or may simply mean the opposite of apical, as in the basal lobes of a leaf.
To the fundamental, basic, or lowest (e.g., basal anesthesia, the first stage of unconsciousness).