What is etoliation?

Answer 1

It has no meaning at all. It is a spelling error by someone meaning to use the word etiolation. Etiolation is the reaction of a plant to a lower than desirable light level, wherein the plant extends (towards where light might be greater) with increase of internodal length and usually accompanied by pale colour and weakness.

Answer 2

Etiolation is a phenomenon in plants that occurs when they grow in darkness or low light conditions. It is characterized by pale color, elongated stems, and small, undeveloped leaves as the plant tries to reach for sunlight. Etiolated plants are generally weaker and more vulnerable to stress.