Samāsa Saṃhitā is a lost work on astrology by the 6th-century astrologer-astronomer Varāhamihira of present-day central India.
It is now lost, but at least 142 verses on it survive in Saṃhitā-vivṛti, Utpala's commentary on the Bṛhat Saṃhitā, often identifiable by the phrase "tatha cha Samāsa-saṃhitāyam".
[5] The Samāsa Saṃhitā definitely existed in the 9th century CE, when Utpala mentioned it.
[6] Samāsa Saṃhitā was an abridged version of the Brihat-saṃhitā, and borrowed some verses from it verbatim.
[7] For example, it mentions a legend about the sage Agastya devouring the demon Vatapi, which is absent from the Brihat-saṃhitā.