bone lacuna a small cavity within the bone matrix, containing an osteocyte; from it slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.acuna, absorption (Howship's lacuna), n an area (pit) of bone resorption, usually irregular in outline, and often containing osteoclasts.
Wide area network. A wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance. Wide area networks are often established with leased telecommunication circuits.
VLAN (Virtual Local Area Network) is a logical local area network (or LAN) that extends beyond a single traditional LAN to a group of LAN segments, given specific configurations. Since a VLAN is a logical entity, its creation and configuration is done completely in software.here are only two types of VLAN possible today, cell-based VLANs and frame-based VLANs. 1  Cell-based VLANs are used in ATM switched networks with LAN Emulation (or LANE). 2  Frame-based VLANs are used in Ethernet networks with frame tagging.