مملص doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 2 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• مُمْلَصٌ

  مُمْلَصٌ ذ Brought forth prematurely; as also : (M, TA:) an abortion. (TA.) You say, أَلْقَتْ وَلَدَهَا مُمْلَصًا She cast her young one prematurely; (TA;) as also and مَلِيطًا. (K, TA.)…

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• مُمْلِصٌ

  مُمْلِصٌ ذ A woman, and a she-camel, (M,) that brings forth her offspring prematurely, (M,) or dead: (K:) pl. مَمَالِيصُ, with ى. (M, TA.)…

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