-eous +

(Latin: a suffix; composed of, of the nature of, like)

1. Of the nature of or resembling nectar.
2. Delicious or sweet.
3. Pertaining to, containing, or resembling nectar; delicious; nectarean.
orchidaceous (adjective), more orchidaceous, most orchidaceous
1. Resembling an orchid flower in some way, especially in being showy: In preparing the wedding, the couple wished for orchidaceous themes at the reception party following the ceremony.
2. Relating to the family of orchids: The friends noticed some insects infesting their orchidaceous plants in their greenhouse.
A reference to the palms; of the nature of, or resembling, palms.
papyraceous (adjective), more papyraceous, most papyraceous
Regarding something made of, or resembling paper; papery: June used special papyraceous material, similar to parchment, for putting her cookies on for baking.
1. Relating to the periosteum.
2. Situated around bone; of or pertaining to the periosteum.
plumbeous (adjective)
Resembling, consisting of, or containing lead; leaden.
poaceous (adjective) (not comparable)
In botany, belonging to the plant family Poaceae: The thin and poaceous stems of the meadow grass swayed to and fro in the breeze while the couple were taking a stroll in the early evening hours.
roboreous (adjective), more roboreous, most roboreous
Of the nature of or pertaining to oak which is symbolic of strength.
A reference to the soles of the feet.
terraceous (adjective), more terraceous, most terraceous
Earthen or of the earth. earthy: The jug Sam was using was from his neighbour who said it was made of a terraceous clay.
terreous (adjective), more terreous, most terreous
Outdated, referring to earth; earthy: In his geology class, Jim examined the terreous substances and terreous particles by using his microscope.
Resembling a tortoise shell.
vinaceous (adjective), more vinaceous, most vinaceous
Relating to the reddish color of wine; wine-colored: The grape juice Jack ordered at the restaurant was of a vinaceous hue or shade.
1. Resembling glass.
2. Relating to, resembling, or having the nature of glass; glassy.
3. Obtained or made from glass.
4. Of or relating to the vitreous humor.
5. Glasslike or hyaline; often used alone to designate the vitreous body of the eye.

The vitreous body refers to the transparent gel that fills the inner portion of the eyeball between the lens and the retina; also called, hyaloid body, humor cristallinus, and crystalline or vitreous humor.

Also see this closely related -aceous suffix unit.