a shad

ཨ་ཤད
partial Ah (navel region or below, derives from mother, red, produces biological warmth), second half of Ah, fierce [JV]

asheh [RY]

the A stroke [RY]

1) like wartu a thung, a long single stroke letter A; 2) stroke like a thung; 3) expression of compassion [IW]

1) like wartu a thung, a long single stroke letter A [Thu mi Sambhota' first form of u me letters, not used afterwards, source of Shambhala ashe.]; 2) stroke like a thung [like usual A with the last stroke to the right removed, or only the last stroke [IW]

Asheh, visualized in tummo practice [RY]