Several commenters wrote CO$ in the forum to signal their criticism of the group's fundraising practices.

When naming new monoclonal antibodies, chemists sometimes insert the infix -co- before -xi- or -zu- to make the name easier to pronounce.

When co's notes were lost, everyone scrambled to reconstruct the meeting's decisions.

Harrison & Co. introduced a new line of eco-friendly notebooks yesterday.

When my cos moved back to town, the whole family celebrated.

I didn't go to the party cos I was exhausted.

Several cos announced a joint venture to develop sustainable packaging.

I prefer the crisp texture of cos in my Caesar salad.

Cos has become one of my favorite summer destinations after my trip last year.

A coed in the dorm organized a study group for the chemistry exam.