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Answer for the clue "Terrestrial worm that burrows into and helps aerate soil ", 7 letters:
crawler

Alternative clues for the word crawler

Word definitions for crawler in dictionaries

Wikipedia Word definitions in Wikipedia
In BEAM robotics , a Crawler is a robot that has a mode of locomotion by tracks or by transferring the robot's body on limbs or appendages. These do not drag parts of their body on the ground.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Crawler \Crawl"er\ (kr?l"?r), n. One who, or that which, crawls; a creeper; a reptile.

Wiktionary Word definitions in Wiktionary
Etymology 1 n. 1 (context Australia obsolete English) A person who is abused, physically or verbally, and returns to the abuser a supplicant. 2 (context UK Australia slang English) A sycophant. Etymology 2 n. 1 A child who is able to creep using his hands ...

Usage examples of crawler.

His head sticking over the chair back, The big-shot was taking a speedy ride, catercornered across the hallway, while Crawler and his pals gazed in wonderment.

The crawler lurched downslope, blasting out a fine spray of lichenophagous bacteria.

When he had eaten six of the crawlers he decided that he had had enough and pushed the rest of the heap back toward the noctambulo, who gathered them up without comment and set about devouring them.

Small-lives in large numbers and variety pattered about, nosing out grubs, picking crawlers off leaves and grassblades, munching on tender greens, sucking juice from plants or other animals, grubbing up roots and tubers of all kinds, a web of busy life invisible and vigorous and non-threatening.

Like the four-leggeds and wingeds, and swimmers and crawlers, like the movements of smoke and water, like the visions that come in our dreams, the wind is a message bearer.

About eleven the infantry began to go forward with an advance which would have astonished the martinets of Aldershot, an irregular fringe of crawlers, wrigglers, writhers, crouchers, all cool and deliberate, giving away no points in this grim game of death.

I vented some of my anger in driving uncounted generations of crawlers out of the corners of the ruined hall, but I was still seething inside.

The Mockers had been driven to ground, and the invaders, working for someone known only as the Crawler, had also suffered, as the Prince of Krondor had acted to restore order to his city.

Silden, and the apparent link between the Crawler and the Nighthawks at Kenting Rush, I can only come to one conclusion.

First, what is the relationship between the Nighthawks and the Crawler?

Perhaps those dark forces are sending additional agents to insure their ends, regardless of what the Nighthawks and the Crawler achieve.

In Baghdad it was three in the morning and the night-club crowd and pub crawlers who stayed a perpetual half hour ahead of closing time around the world, cheered him alcoholically.

Shadows were crossing the baulks -- workers deserting the dig, moving silently towards the sanctuary of the other crawler.

But when she left, she caught up with the rest of her brigade and directed them towards the nearest crawler, leaving the other -- the one containing his stateroom -- for him alone.

But the crawler was already at the foot of a flat hill, the same one which was displayed as a curved oval marked 211 on areographic maps.