acet abulum

[Lat. = (1) a ve el for holding vinegar; (2) the socket of the hipbone; (3) the suckers of polypi; (4) the calyx of flowers. From acetum (q. v.).] I. Anatomy: 1. A cavity in any bone designed to receive the protuberant head of another one, so as to constitute the kind of articulation called enarthrosis. Spec ., the socket of the hip-joint in man. the acetabulum, an articular depre ion." -Todd & Bowman: Physiol. Anat., 1. 105. 2. A glandular substance found in the placenta of some animals. 3. The fleshy suckers with which the Cephalopod a and some other Invertebrata are provided. II. Zoology : A genus of polypes. III. Botany: 1. A species of lichen. 2. A cotyledon. 3. The receptacle of certain fungals.