A neurotransmitter; not involved in plant biology.

An enzyme that breaks down acetylcholine; not found in plants.

A rare condition of limb absence; not botanical.

Absence of one or both hands; not used in botany.

A small, dry, one-seeded fruit that does not open at maturity, typical of many flowering plants.

Relating to a prehistoric stone tool industry; not relevant to botany.

Absence or loss of pigmentation; occasionally used in describing plant or algal pigments.

Needle-shaped; used to describe narrow, pointed plant structures such as leaves.

A substance that increases the hydrogen ion concentration in a solution; relevant in plant physiology and soil chemistry.

A compound derived from an acid by the removal of water; may participate in plant metabolic pathways.