-oid, -oidal, -oidism, -odic

(Greek: a suffix; like, resembling, similar to, form)

Monstrous, resembling a monster (denotes any malformed animal, including man, that deviates grotesquely from the norm with the implication that the result is hideous, frightening, and revolting. Anyone who has viewed "freak shows" at circuses or carnivals has been exposed to teratological experiences.
Resembling a testis.
thalassoid (adjective) (not comparable)
Regarding freshwater organisms resembling, or originally, marine forms: Such thalassic or halolimnic creatures are modified or able to live in water that is not salty.
Resembling death; apparently dead; deathlike.
Like an animal.
Like or having the form of a brute; of bestial nature or character.
A man considers himself to be a raging bull.
Any of a group of chlorophyll-containing membranous structures resembling sacs in which photosynthesis takes place.

Thylakoids are stacked one on top of the other in the chloroplast layers grana (in which the green pigment chlorophyll is contained) of most plants.

Resembling a tiger or tiger's skin; marked like a tiger; having the characteristics of a tiger (fierce, aggressive, etc.).
toroid (s) (noun), toroids (pl)
1. In geometry, a surface that is created by the rotation of any closed curves; such as, a circle or ellipse around an axis in its plane.
2. In electricity, an electromagnetic coil that is wound on a ring of circular cross-sections.
1. In math, a quadrilateral that has two parallel sides.
2. A small bone in the wrist near the metatarsal bone that connects with the index finger.

Inter-related cross references, directly or indirectly, involving word units dealing with "form, shape, appearance": eido-; figur-; form-; icono-; ideo-; imag-; morpho-; typo-.