disciplinae
disciplinae is a Latin form of disciplina, meaning “teaching, instruction; training, discipline; system, method”. It is the genitive singular feminine noun.
Found 158 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 6.13.4: Illi rebus divinis intersunt, sacrificia publica ac privata procurant, religiones interpretantur: ad hos magnus adulescentium numerus disciplinae causa concurrit, magnoque hi sunt apud eos honore.
All forms of disciplina (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.