×
Please click
here
if you are not redirected within a few seconds.
All
Images
Videos
Books
Maps
News
Shopping
Search tools
Any time
Any time
Past hour
Past 24 hours
Past week
Past month
Past year
All results
All results
Verbatim
Theca
<
>
View all
In biology, a theca is a sheath or a covering.
Wikipedia
