inequilateral

[ in-ee-kwuh-lat-er-uh l ]

/ ˌɪn i kwəˈlæt ər əl /

not equilateral; having unequal sides.

Origin of inequilateral

First recorded in 1655–65; in-³ + equilateral

in·e·qui·lat·er·al·ly, adverb

These organs retain their normal bilaterality, but the body is, as a rule, inequilateral.

Zoology: The Science of Animal Life |Ernest Ingersoll
Under the microscope they are yellowish, oval or short oblong, often inequilateral, 6–8 × 4–5 µ.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. |George Francis Atkinson
The spores are wood brown in color, oval to short elliptical and inequilateral 6–8 × 4–5 µ.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. |George Francis Atkinson
A simple vertical elevation of the occiput, giving the head in most instances a squared and inequilateral form.

Some Observations on the Ethnography and Archaeology of the American Aborigines |Samuel George Morton

The shells are under an inch in length, and have a peculiarly shortened anterior portion; thus they are inequilateral.

The Sea-beach at Ebb-tide |Augusta Foote Arnold