Srila Siddhaswarupananda Paramahamsa

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Abhiseka– a bathing ceremony, particularly for the coronation of a king or the installation of the Lord's Deity form.
Absolute Truth – the ultimate source of all energies.
Acamana – purification by sipping water and chanting names of the Lord, especially during a sacrifice.
Acarya – an ideal teacher, who teaches by his personal eample; a spiritual master.
Acintya-bhedabheda-tattva – Lord Caitanya's doctrine of the "inconceivable oneness and difference" of God and His energies.

WHO ARE YOU? DISCOVERING YOUR REAL IDENTITY
What is your essence? Is it matter—a mere collection of material atoms and molecules? Or is it something else?
Science of Identity Foundation – Siddhaswarupananda

Acintya-sakti – the inconceivable energy of the Supreme Lord.
Acit – without life or consciousness.
Acyuta – the Supreme Lord, who can never fall down from His position.
Adbhuta – the [rasa] (devotional sentiment) of wonder or amazement.
Adharma – irreligion.
Adhibhautika misery – misery caused by other living beings.
Adhidaivika misery – misery caused by nature.
Adhidaivika powers – the administrative functions delegated by the Lord to demigods, such as control over rain, wind and sun.
Adhoksaja – the Supreme Lord, who is beyond material sense perception.
Adhyatmika misery – misery caused by one's own body and mind.
Adi-purusa – the Supreme Lord, Krsna, the original person.
Aditi – the mother of the demigods.
Adityas – the demigods who are descendants of Kasyapa Muni's wife Aditi.
Advaita Prabhu – an incarnation of Visnu who appeared as a principal associate of Lord Caitanya Mahaprabhu.
Advaita-vadis – atheistic philosophers who say all distinctions are but material illusions. [See also:] Mayavadis.
Aghasura-the python – shaped demon sent by Kamsa to kill Krsna.
Agni – the demigod of fire.
Agnihotra-yajna – the ceremonial fire sacrifice performed in Vedic rituals.
Aham brahmasmi – the Vedic aphorism "I am spirit."
Aham mameti – the false conception of "I" and "mine."
Ahangraha-upasana-self – worship, not recommended for anyone other than God.
Ahankara – false ego, by which the soul misidentifies with the material body.
Ahimsa – nonviolence.
Aja – the unborn; the Supreme Lord.
Ajagara-vrtti – the life pattern of a python.
Ajamila – a fallen [brahmana] who was saved from hell by chanting the name of Lord Narayana at the time of death
Ajnata-sukrti – pious or devotional activity performed accidentally, without knowledge of its effect.
Akama – free from material desire.
Akama-bhakta – one who serves the Lord without material motive.
Akarma – "nonaction"; devotional activity for which one suffers no reaction.
Akincana-gocara – Lord Krsna, who is easily approached by those who are materially ehausted.
Akrura – an uncle of Lord Krsna.
Aksauhini – a military division consisting of 21,870 chariots, 21,870 elephants, 109,350 infantrymen and 65,610 horses.
Akuti – one of Svayambhuva Manu's three daughters. She was the wife of Ruci.
Amara-kosa dictionary – a dictionary of the Sanskrit language.
Ambarisa Maharaja – a great devotee king who perfectly eecuted all nine devotional practices (hearing, chanting, etc.).
Amsa – an epansion of the Supreme Lord.
Anakadundubhi – another name of Vasudeva, the father of Krsna.