  Optical spectroscopy of the Type Ia supernova SN 2002ic obtained on 2003 June
27.6 UT, i.e., about 222 rest-frame days after explosion, is presented. Strong
H emission indicates an interaction between the expanding SN ejecta and an
H-rich circumstellar medium (CSM). The spectrum of SN 2002ic resembles those of
SNe 1997cy and 1999E. The three SNe also have similar luminosities, suggesting
that they are the same phenomenon and that the CSM is also similar. We propose
a new classification, Type IIa SNe, for these events. The observed line
profiles and line ratios are measured and discussed within the ejecta-CSM
interaction scenario. The emission in H Balmer, [O III], and He I lines, and in
permitted Fe II blends, resembles the spectra of the Type IIn SN 1987F and of
Seyfert 1 galaxies. A high-density, clumpy CSM is inferred. Strong, very broad
[Ca II]/Ca II and [O I]/O I missions imply that not all the outer SN ejecta
were decelerated in the interaction, suggesting that the CSM is aspherical.
