In the original Euclid's first definition is semeion estin, ou meros outhen.
I have quoted it on p.

86 in the expanded form taught to me in childhood, 'without parts and without magnitude.' I should have consulted Heath's English edition--a classic from the moment of its issue--before committing myself to a statement about Euclid.

This is however a trivial correction not affecting sense and not worth a note.

I wish here to draw attention to Heath's own note to this definition in his _Euclid in Greek_.

He summarises Greek thought on the nature of a point, from the Pythagoreans, through Plato and Aristotle, to Euclid.