(Latin: from -icalis, a suffix that forms adjectives from nouns; of or having to do with; having the nature of; constituting or being; containing or made up of; made by or caused by; like, characteristic of; art or system of thought; chemical terms)

Relating to or formed by trees.
archetypical (adjective), more archetypical, most archetypical
Concerning an original type after which other similar things are patterned; archetypal: Sally was the archetypical student body president being very organised and active in school life.
aromatical (adjective)
Pertaining to, or containing, aroma; fragrant; spicy; strong-scented; having an agreeable odor; odoriferous; such as, aromatic balsam.
artistical (adjective)
1. Pertaining to art or to artists.
2. Something made in the manner of an artist.
3. Conformable to art.
4. Characterized by art.
5. Showing taste or skill.
aspherical (adjective), more aspherical, most aspherical
With reference to a reflecting surface or lens, deviating slightly from a perfectly round shape and relatively free from aberrations: "In photography, a lens assembly that includes an aspheric element is often called an aspherical lens."

"As a joke, Lance described his cat as aspherical; that is, not quite round but very plump."

Relating to a star-shaped object or objects.
Relating to or concerned with astrology; such as, astrological learning or astrological prognostication.
A reference to the study of the theoretical effects of astronomical bodies and forces on the earth's atmosphere.
astronautical (adjective) (not comparable)
A reference to traveling in outer space or the science and technology of space flight.
1. Relating to the science of astronomy.
2. Extremely large: "The cost of this house was astronomical!"
1. Relating to or used in astrophysics.
2. Relating to stellar physics, or the study of the physical structure of the stars.
asymmetrical (adjective), more asymmetrical, most asymmetrical
1. Pertaining to something that is not balanced or regularly arranged on opposite sides of a line or around a central point.
2. A reference to something that is lacking equality, balance, or harmony and so not having the same shape and size on both sides.
3. In chemistry, a reference to a carbon atom which has four different atoms or structural groups attached to it, resulting in an unbalanced spatial arrangement of atoms in a molecule, so that the molecule cannot be superimposed on its mirror image.
4. In electrical engineering, relating to varying conductivity or a description of a substance or a device that exhibits varying or different conductivities for electric currents flowing through it in different directions.
5. Referring to an aircraft which is unbalanced because of an unequal thrust from two or more sources; such as, when one engine of a pair is not functioning properly.
atheological (adjective), more atheological, most atheological
1. Opposed to the study of God, a god, or gods, and the beliefs of religion in general.
2. Against an organized method of interpreting spiritual works and beliefs.
atypical (adjective), more atypical, most atypical
Descriptive of not being characteristic, not usual, or not normal: Keith Jackson made an atypical speech that disappointed his voters.

Glenda had an atypical lifestyle in that she had a wholesome diet and went to the fitness studio for at least 90 minutes each of six days every week when she wasn't traveling or didn't have other priorities to take care of.