Graphemes: ǣ, ǽ
Classes: long open front vocalic vowel
Features +long +low -high -back +syllabic +voice
Related rules
Origin
oe-breaking-before-h: æ > ea / _h, e > eo / _h, i > io / _h, ī > īo / _h, ǣ > ēa / _hoe-long-ae-retraction: ǣ > ā / _C[+back]