Moreover, there is no difficulty in inoculating young calves or adult bulls, and the lesions so produced do not vary in a single particular from those observed in so-called spontaneous cases.
Virus derived directly from a case of so-called spontaneous cow-pox.
This notion may have been due to the observation that so-called spontaneous cow-pox is met with only in cows that are in milk.
This may be attributed partly to the principle of correlated growth, and partly to so-called spontaneous variation.
In the third place, we have to allow for the direct and definite action of changed conditions of life, and for so-called spontaneous variations, in which the nature of the conditions apparently plays a quite subordinate part.
Finally, the blood of the last pigeons exhibits much more virulence in the pig than even the most infectious products of a pig that has died of what is called spontaneous fever.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "called spontaneous" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.