gelatinous

Think of jellyfish or the wobbly texture of a fruit-flavored dessert. "Gelatinous" describes something with a jelly-like consistency: soft, slippery, and not fully solid. It may wobble, hold its shape only loosely, and sometimes look partly transparent. You might use it for sea creatures, thick liquids, or foods with a jelly-like texture.

Imagine a bowl of Jell-O or the body of a jellyfish: soft, quivering, and only loosely holding its shape. That is the kind of texture "gelatinous" describes. The word comes from "gelatin," and it is used for things that feel or look like jelly rather than something firm and solid.

You might see it used for marine life, since many sea creatures have soft, jelly-like bodies. It can also describe foods or substances with that same texture, especially when they seem thick, slippery, or slightly transparent. A sauce, a mass of eggs, or an undercooked egg white might all be described this way if they have that soft, jiggly feel.

In short, the word is mainly about texture and form. If something wobbles when touched, seems half-solid, or has the look and feel of jelly, "gelatinous" is a natural word for it. It often brings to mind something a little strange or unpleasant, but the core idea is simply jelly-like softness.