Diploë

{{No footnotes|article|date=June 2015}}

{{Infobox anatomy

| Name = Diploë

| Latin = diploe

| Image = Gray564.png

| Caption = Veins of the diploë as displayed by the removal of the outer table of the skull.

| Image2 =

| Caption2 =

| Precursor =

| System =

| Artery =

| Vein = Diploic veins

| Nerve =

| Lymph =

}}

Diploë ({{IPAc-en|ˈ|d|ɪ|p|l|oʊ|i}} or {{respell|DIP|lo-ee}}) is the spongy cancellous bone separating the inner and outer layers of the cortical bone of the skull.{{cite web|title=Definition of DIPLOE|url=http://www.merriam-webster.com/dictionary/diploe|website=www.merriam-webster.com}} It is a subclass of trabecular bone.{{cite web |title=Foundational Model of Anatomy - Diploe - Classes {{!}} NCBO BioPortal |url=https://bioportal.bioontology.org/ontologies/FMA/?p=classes&conceptid=http%3A%2F%2Fpurl.org%2Fsig%2Font%2Ffma%2Ffma76630 |website=bioportal.bioontology.org |access-date=25 January 2023}}

In the cranial bones, the layers of compact cortical tissue are familiarly known as the tables of the skull; the outer one is thick and tough; the inner is thin, dense, and brittle, and hence is termed the vitreous table. The intervening cancellous tissue is called the diploë. In certain regions of the skull, this becomes absorbed so as to leave spaces filled with liquid between the two tables.