1) Axial 2) In or of an axis 3) In the main stem of a plant 4) Near a reference line 5) Of a certain line 6) Stalk 7) Stem 
on an axis; of a placenta, on the central axis of the ovary.
• (a.) Situated in the axis of anything; as an embryo which lies in the axis of a seed.
Pertaining to an axis; used to describe ovary placentation when the ovules are attached to a central axis in the ovary.
<botany> Describes a plant part which is on an axis, of a placenta, on the central axis of the ovary. ... (02 Jan 1998) ... 
Describing a placentation type in which ovules are attached where the septae intersect in the center of an ovary having two or more cells.
Ax'ile adjective Situated in the axis of anything; as an embryo which lies in the axis of a seed. Gray. 
Borne in or on the axis, or relating to it.
Type: Term Pronunciation: ak′sīl Synonyms: axial1
[adj] - (botany) relating to or attached to the axis
adjective relating to or attached to the axis; `axial angle`
in or of an axis.