-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) (not comparable)
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 life forms in the sea, including hydras, polyps, jellyfishes, and corals, for his term paper.
actual (adjective) (not comparable)
1. Concerning something that exists and is not merely potential or possible: Jack was told by the garage that the actual damages on his car would take at least a week to repair.
2. Regarding something that fits in to the distinctiveness of a type or group: Celia asked, "Is that person an actual doctor, or just a quack?"
3. Relating to something that is based on fact: Barbara presented an actual account of the accident just as it happened.
actual cautery (s) (noun), actual cauteries (pl)
1. In surgery, a device used as the cauterizing agent: Professor Smart showed his students an actual cautery which was used to destroy abnormal tissue by burning, searing, or scarring.
2 The process of destroying tissue with a cauterant: Dr.Thompson used the method of actual cautery to burn away the infected tissues with a hot iron.
acuticostal (adjective), more acuticostal, most acuticostal
Pertaining to the condition of 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.

Am abaxial plant part is on the side of a plant and faces toward the the axis.

adenoneural (adjective) (not comparable)
An obsolete term that relates to a gland and a nervous element: Dr. Hathaway explained that adrenoneural junctions referred to the connection of a gland with 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), more adjectival, most adjectival
In grammar, pertaining to the function as an adjective: An adjectival word describes a person or thing, for example the word "fancy" is used in an adjectival way in "a fancy dress".