a suffix with the meanings “resembling, having the nature of,” “made of,” occurring in loanwords from Latin (cretaceous; herbaceous) and forming adjectives in English on the Latin model (ceraceous), especially adjectival correspondents to taxonomic names ending in -acea, and -aceae: rosaceous .
relating to, belonging to, having the nature of, or resembling: herbaceous, larvaceous
word-forming element denoting “belonging to, of the nature of,” from Latin -aceus, enlarged form of adjectival suffix -ax (genitive -acis); see -acea. Especially in biology, “pertaining to X order of plants or animals.”
A suffix used to form adjectives meaning “made of” or “resembling” a particular substance or material, such as silicaceous, containing silicon.
acep American College of Emergency Physicians
Also, acephalic [ey-suh-fal-ik] /ˌeɪ səˈfæl ɪk/ (Show IPA). Zoology. headless; lacking a distinct head. without a leader or ruler. adjective having no head or one that is reduced and indistinct, as certain insect larvae having or recognizing no ruler or leader adj. “headless,” 1731, from French acéphale + -ous, or directly from Late Latin acephalus, […]
acephalocardia acephalocardia a·ceph·a·lo·car·di·a (ā-sěf’ə-lō-kär’dē-ə, ə-sěf’-) n. Absence of the head and heart in the parasitic member of conjoined twins.
acephalobrachia acephalobrachia a·ceph·a·lo·bra·chi·a (ā-sěf’ə-lō-brā’kē-ə, ə-sěf’-) n. See abrachiocephalia.
acephalocheiria acephalocheiria a·ceph·a·lo·chei·ri·a or a·ceph·a·lo·chi·ri·a (ā-sěf’ə-lō-kī’rē-ə, ə-sěf’-) n. Congenital absence of the head and hands.