Merge pull request ceph#54545 from zdover23/wip-doc-2023-11-17-start-…

…intro-osd-glossary

doc/start: explain "OSD"

Reviewed-by: Anthony D'Atri <anthony.datri@gmail.com>

doc/start/intro.rst

@@ -9,10 +9,10 @@ System`.  All :term:`Ceph Storage Cluster` deployments begin with setting up
 each :term:`Ceph Node` and then setting up the network. 
 
 A Ceph Storage Cluster requires the following: at least one Ceph Monitor and at
-least one Ceph Manager, and at least as many Ceph OSDs as there are copies of
-an object stored on the Ceph cluster (for example, if three copies of a given
-object are stored on the Ceph cluster, then at least three OSDs must exist in
-that Ceph cluster). 
+least one Ceph Manager, and at least as many :term:`Ceph Object Storage
+Daemon<Ceph OSD>`\s (OSDs) as there are copies of a given object stored in the
+Ceph cluster (for example, if three copies of a given object are stored in the
+Ceph cluster, then at least three OSDs must exist in that Ceph cluster).
 
 The Ceph Metadata Server is necessary to run Ceph File System clients.