-al; -ial, -eal

(Latin: suffix; pertaining to, like, of the kind of, relating to, characterized by, belonging to; action of, process of)

acronical, acronycal, acronychal, acronyctous (adjective) (not comparable)
In astronomy, referring to a star rising at sunset: The acronical appearance of a celestial body may take place at sunrise or in the evening with the setting of the sun..
acronych (adjective) (not comparable)
Descriptive of an occurrence in the evening; vespertine: It can be said that a star is acronych when it appears at dusk.

Sometimes this term is used as if “rising in the evening or at sunset and setting at sunrise”. But this is not correct. When the rising is "acronychal", the setting is "cosmical", and vice versa. (According to the Oxford English Dictionary)

acropetal (adjective) (not comparable)
In botany, referring to the upward progression of growth from the base toward the apex or tip: Janet watched the acropetal development of the tulip plants that she had bought.
acrostichal (adjective) (not comparable)
Descriptive of certain bristles situated in the highest rank or row of particular flies: Mr. Thompson, the biology teacher, referred to specific hairs on the mesonotum of muscoid flies as being acrostichal.
actinal (adjective) (no pl)
1. Pertaining to the oral part of a radiate animal from which the rays grow: Such sea creatures, like the jellyfish, sea anemone, or the sponge, have actinal cavities.
2. Concerning the rays or tentacles of an animal: The starfish is a good example of an actinal aquatic animal having arms extending from its center.
actinozoal (adjective) (not comparable)
In zoology, pertaining to the Actinozoa: Jack wanted to find out more information about actinozoal lifeforms in the sea, including hydras, polyps, jellyfishes, and corals, for his term paper.
actual (adjective) (no comparatives)
1. Existing and not merely potential or possible.
2. Being, existing, or acting at the present moment; current.
3. Based on fact: "She presented an actual account of the accident just as it happened."
actual cautery
A procedure in which a very hot iron is used as the cauterizing agent.
acuticostal (adjective), more acuticostal, most acuticostal
Pertaining to or having projecting ribs: After having lost so much weight, Anita thought that she had acuticostal bones that extended from the spine towards the backbone because she could definitely see them, so she tried gaining more weight again.
acutilingual (adjective), more acutilingual, most acutilingual
Referring to animals that have a sharply pointed tongue or mouth: In zoology, it is stated that certain bees are acutilingual.
adaxial (adjective) (not comparable)
Descriptive of that which is nearest to or facing toward the axis of an organ or organism: The top part of a leaf is known as the adaxial side or surface.

Abaxial describes a plant part which is on the side of an plant and faces toward the the axis.

adenoneural (adjective) (not comparable)
Obsolete term relating to a gland and a nervous element: Dr. Hathaway explained that adrenoneural junctions referred to the joining of a gland and a nerve.
adipal (adjective), more adipal, most adipal
1. Referring to the condition of being fat; fatty: The bacon Jane wanted to prepare for breakfast was quite adipal and greasy, and had to be fried first before serving with scrambled eggs.
2. Concerning being chubby; adipose: During her teenage years, Jenny seemed to have an adipal figure, so she decided to diet in order not to become even fatter!
adipodermal graft (s) (noun), adipodermal grafts (pl)
Skin-fat graft: An adipodermal graft was performed surgically in order to replace the damaged tissue.
adjectival (ajective)