> as lemmas
semi-tangent
semi-tangent n. 
/ˈsɛmiˌtændʒənt/ the tangent of half an arc.
Brit. /ˈsɛmɪˌtan(d)ʒ(ə)nt/
, /ˈsɛmɪˌtan(d)ʒ(ə)nt/U.S. /ˈsɛˌmaɪˌtændʒənt/
, /ˈsɛˌmaɪˌtændʒənt//ˈsɛmiˌtændʒənt/ΘΚΠ
the world > relative properties > number > geometry > line > [noun] > tangent
touchline1551
adscript1636
tangent1655
focal tangent1706
semi-tangent1823
tractor1867
bitangent1873
slope1889
1823 J. Mitchell Dict. Math. & Physical Sci. at Projection Any arc EMF of a great circle is projected into the sum of its semi-tangents.
<
as lemmas