-oid, -oidal, -oidism, -odic

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

retinoid
1. Resembling the retina.
2. Any of a group of substances related to vitamin A and functioning like vitamin A in the body.
rhabdoid, rhabdoidal
1. Rod-shaped.
2. Resembling a rod.
rheumatoid
rhizoid
1. A slender outgrowth on mosses, liverworts, and the reproductive cells of ferns that absorbs nourishment in much the same way as a root.
2. Any of various slender filaments that function as roots in mosses, ferns, fungi, etc.
rhyssoid
sarcoid
1. Resembling flesh.
2. A small epithelioid tubercle-like lesion characteristic of sarcoidosis (chronic multisystem disease).
sauroid
In zoology, resembling a reptile.
scaphoid
scaraboid
A (gem) similar to a scarab.
scleroid
scolecoid
Resembling a worm.
selenoid
Crescentic.
serranoid
A reference to the Serranidae or a large family of fish with large mouths and small spines on the gill coverings.

They usually have several rows of sharp teeth, normally with a pair of particularly large, canine-like teeth projecting from the lower jaw.

The family contains about 450 species of serranids in 64 genera, including sea basses and groupers (typically having stout bodies and large mouths).

sialoid
Resembling saliva.
spermatoid

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