from Wiktionary, Creative Commons Attribution/Share-Alike License
- abbr. that
from the GNU version of the Collaborative International Dictionary of English
- an old method of printing that (AS. þæt, ðæt) the “y” taking the place of the old letter “thorn” (þ). Cf. ye, the.
from The Century Dictionary and Cyclopedia
- n. An occasional symbol for yttrium. The single letter Y is more generally so used.
y taking the place of the old letter thorn (þ), as in ye. (Wiktionary)