On grammatical class:

te'u
elidable terminator: end conversion between non-mex and mex; usually elidable.

In definition:

cmavrte'u
x1 is the selma'o "TEhU".

In notes:

mekseia
x1 is a part of Lojban text representing rule 'mex-operator' according to the first edition of the book 'The Complete Lojban Language'.
ci zei mektika
x1 is a part of Lojban text representing rule 'operand-3' according to the first edition of the book 'The Complete Lojban Language'.