hollow back

== English == === Pronunciation === (This entry needs an audio pronunciation. If you are a native speaker with a microphone, please record this word. The recorded pronunciation will appear here when it's ready.) === Noun === hollow back (countable and uncountable, plural hollow backs) Lumbar lordosis. Alternative forms: hollow-back, hollowback Used other than figuratively or idiomatically: see hollow,‎ back. ==== See also ====