apex of sacrum

a·pex of sa·crum

the tapering lower end of the sacrum that articulates with the coccyx.
Synonym(s): apex ossis sacralis/sacri [TA]
References in periodicals archive ?
2,5,6] Sometimes fifth lumbar vertebra may fuse with the first sacral vertebra (Sacralization of L5) or first coccygeal vertebra may fuse with the apex of sacrum (Sacralization of coccygeal vertebra).
The fifth pair of sacral foramina is generated either due to fusion of first coccygeal vertebra to apex of sacrum or fifth lumbar vertebra with first sacral vertebra.
When first coccygeal vertebra fuses with the apex of sacrum, this process is known as sacralization of coccygeal vertebra [2,3].