having to do with the tip of a leaf or stem.
apical (Wikipedia)
Apical means "pertaining to an apex". It may refer to:
- Apical ancestor, refers to the last common ancestor of an entire group, such as a species (biology) or a clan (anthropology)
 - Apical (anatomy), an anatomical term of location for features located opposite the base of an organism or structure
 - Apical (chemistry), a position in certain molecular geometries in chemistry
 - Apical (dentistry), direction towards the root tip of a tooth
 - Apical consonant, a consonant produced with the tip of the tongue
 - Apical dendrite, a type of dendrite found on pyramidal neurons
 - Apical dominance, the phenomenon whereby the main, central stem of a plant is dominant over other side stems
 - Apical membrane, in cell biology the surface of a plasma membrane that faces inward to the lumen
 - Apical meristem, or apex, on a flower